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Past Projects

Master Projects

ludovicConception, modélisation, réalisation et évaluation d’un support de cellule pour horloge atomique miniature

Ludovic Zulliger, in collaboration with CSEM, September 2015

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JoseStructures flexibles en contexte chirurgical

José Rivera, in collaboration with INSA Strasbourg, September 2015

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confidential

Design of a new surgical instrument for robotic application

Loïc Bovay, in collaboration with industrial partner, April 2015

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micro-couple

Capteur de microcouple pour caractérisation de paliers horlogers

Jonas Graf, in collaboration with Baur SA, March 2015

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Development of a 7-DOF force feedback haptic interface for microsurgery

Billy Nussbaumer, in collaboration with Stanford University, April 2013

7DOF

 

Semester Projects

2015 – 2016                                                                     

radiometreOscillateurs mécaniques alimentés par la lumière

Summer internship – Summer 2016

Student: Benoît Dubath

Assistants: Etienne Thalmann, Billy Nussbaumer

Description: This project concerns the use of electromagnetic waves as an energy source to maintain high quality mechanical oscillators.

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20152016Camille

Broche vibrante pour violoncelles, altos et violons

Semester Project – Fall 2015/2016

Student: Camille Boymond

Assistants: Billy Nussbaumer

description: Un luthier a développé un accessoire pour violoncelles, altos et violons qui clarifie et enrichit le spectre sonore des instruments et augmente leur réactivité dynamique. Le but de ce projet de semestre est de concevoir une série de démonstrateurs dotés des mêmes propriétés vibratoires que l’objet artisanal mais réalisés par des technologie adaptées à une production à plus large échelle.

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20152016JonathanMesure de l’amplitude d’un oscillateur par vision

Semester Project – Fall 2015/2016

Student: Jonathan Lutz

Assistants: Nicolas Ferrier, Billy Nussbaumer

Description: Dans le but de mieux comprendre et d’améliorer ses prototypes d’oscillateurs, le laboratoire désire caractériser leur isochronisme. Pour cela il est nécessaire de connaître la période ainsi que l’énergie de cet oscillateur pour plusieurs couples différents.

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20152016Rafael

Curette (outillage chirurgical) 

Semester Project – Fall 2015/2016

Student: Rafael Tobler

Assistants: Dr. Baur Charles, Fifanski Sebastian, Clogenson Marine, Rivera Gutiérrez José

Description: Le but du projet est la réalisation d’une curette pour une application chirurgicale. A l’huere actuelle plusieurs curettes avec des angles différents sont utilisées, l’objectif est de réaliser un seul outil avec possibilité de faire varier l’angle.

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MathieuTransducteur de force / déplacement utilisant des structures flexibles

Semester Project – Fall 2015/2016

Student: Mathieu Aberle

Assistants: Sebastian Fifanski, José Rivera Gutiérrez

Description: Le projet a pour but la
création d’un transducteur mécanique
composé d’éléments flexibles afin de
mesurer les forces en jeu lors d’opérations
chirurgicales oculaires.

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20152016MahdiMicrowatch

Semester Project – Fall 2015/2016

Student: Mahdi Tamizafar

Assistants: Ilan Vardi, Mohammad Kahrobaiyan

 

2014 – 2015                                                                     

ArnoFlexure based minimal invasive surgery tools

Semester Project – Spring 2014/2015

Student: Arno Rogg

Assistants: Dr. Baur Charles, Fifanski Sebastian, Clogenson Marine

Description: This project will focus on development of flexible structure fore flexure based surgical tool. End effector integrated in such flexure will

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SimonLow cost surgical tool for pedicle screw placement

Semester Project – Spring 2014/2015

Student: Simon Métrailler

Assistants: Dr. Baur Charles, Fifanski Sebastian, Clogenson Marine

Description: Ce projet a pour objectif de réaliser un outil chirurgical pour améliorer des opérations d’implantation de vis dans les vertèbres.

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picture of test benchForce Sensor Test Bench

Semester Project – Fall 2014/2015

Student: Michael Monney

Assistants: Dr. Charles Baur, Sebastian Fifanski

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insert pictureEvaluation of rapid prototyping by 3D printing for flexible mechanisms

Semester Project – Fall 2014/2015

Student: Nathan Guelat

Assistants: Dr. Roland Bitterli

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insert pictureGeneric Beacons Interface

Semester Project – Fall 2014/2015

Student: Cinthia Boissonnas

Assistants: Dr. Charles Baur, Marine Clogenson, Tristan Derbanne (Graniteapps)

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insert pictureWatchmaking demonstrator

Semester Project – Fall 2014/2015

Student: Romain Guenat

Assistants: Dr. Roland Bitterli

 

2013 – 2014                                                                     

pictureConcept of inserts with variable geometry for knee prosthesis

Semester Project – Spring 2013/2014

Student: Maïka Guillemin

Asistants: Dr. Charles Baur, Sebastian Fifanski

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insert pictureDevelopment of insert with variable geometry for knee prosthesis

Semester Project – Fall 2013/2014

Student: Caroline Knutti

Assistants: Dr. Charles Baur, David Lengacher

 

Instructions for master project

 

Organisation

  • Before the start of the Master Project: choice of the project, discussion with the responsible and contact with the professor (email with: title of the project and name of responsible).
    The registration to the Instant-Lab secretary should be done minimum 3 weeks before the beginning of the semester.
  • Two weeks after the beginning: detailed workplan and objectives have been established (one page)
  • Mid-project : Intermediate presentation
  • End of the project : Report 17 weeks or 25 weeks after the beginning of the master and within the month after the end of the master project: final presentation 

Reports delivery

  • Master project report has to be sent in PDF to the secretary of the microtechnic section (isabelle.schafer@epfl.ch) before 12 o’clock the due date mentioned in the academic calendar. The same electronic version has also to be sent to the assistant. Follow the guidelines for writing reports.
  • All the electronic datas used and produced during the project (report in PDF, presentation, images, videos, CAD, files…) have to your assistant with a USB-key or hard drive (which will be given back). 

Intermediate oral presentation 10min presentation, 15min discussion

  • Objectives of the project (context, motivation, specifications)
  • Background, description of the problem, hypothesis
  • Methodology – choice of the solutions – theoretical basis
  • Results
  • Analysis of the results (in the perspective of the objectives)
  • Work for the next phase (adjustments of the objectives, management of problems)

Final oral presentation 15min presentation + 15min discussion

Same plan as intermediate presentation + :

  • Conclusion (in the perspective of the initial objectives)
  • Outlook
  • Self evaluation

Evaluation criteria

The projects are evaluated on the basis of the report, work in the lab and oral presentations.

Criteria :
Report: Presentation of the problem, selection of methods, theoretical developments, experimental part, analysis of results and conclusion, quality of the report (writing, layout…)
Work in the lab: Involvement to the project, organization, documentation, quality and quantity of experimental work, creativity, communication with the team
Oral presentations: clarity of the objectives, quality of the presentation, reply to questions

Instructions for semester project

 

Organisation

  • Before the start of the Semester Project: choice of the project, discussion with the responsible and contact with the professor  (email with: title of the project and name of responsible).
    The registration to the Instant-Lab secretary should be done minimum 3 weeks before the beginning of the semester.
  • Two weeks after the beginning: detailed workplan and objectives have been established (one page)
  • Mid-project : Intermediate presentation
  • End of the project : Report and final presentation

Reports delivery

  • Semester project report should be delivered electronically to the assistant and to the Instant-Lab secretary at 12h00 on the due date (refer to academic calendar). One paper copy is also required. Follow the guidelines for writing reports
  • All the electronic datas used and produced during the project (report in PDF, presentation, images, videos, CAD, files…) have to be given to your assistant with a USB-key or hard drive (which will be then given back).

Intermediate oral presentation (mid-semester) 10min presentation, 15min discussion

  • Objectives of the project (context, motivation, specifications)
  • Background, description of the problem, hypothesis
  • Methodology – choice of the solutions – theoretical basis
  • Results
  • Analysis of the results (in the perspective of the objectives)
  • Work for the next phase (adjustments of the objectives, management of problems)

Final oral presentation (Last week of the semester) 15min presentation + 15min discussion

Same plan as intermediate presentation + :

  • Conclusion (in the perspective of the initial objectives)
  • Outlook
  • Self evaluation

Evaluation criteria

The projects are evaluated on the basis of the report, work in the lab and oral presentations.

Criteria :
Report: Presentation of the problem, selection of methods, theoretical developments, experimental part, analysis of results and conclusion, quality of the report (writing, layout…)
Work in the lab: Involvement to the project, organization, documentation, quality and quantity of experimental work, creativity, communication with the team
Oral presentations: Clarity of the objectives, quality of the presentation, reply to questions

 

Open Master and Semester projects

INSTRUCTIONS FOR MASTER AND SEMESTER PROJECTS

Please find below the links towards the instructions for the master or semester projects.
Note : the registration to the Instant-Lab secretary has to be done 3 weeks prior to the semester beginning

and the model sheet for the project resume

Ball with mechanical sound system

To play tennis, visually impaired persons use a ball with bells to indicate where is the ball. The problem with the current ball is that there is a sound only when the ball touches the floor. So the goal of the project is to design an entire mechanical system that produces a sound in continuous way. The new system should not disturb the way the ball acts.

The project is in collaboration with a French association for visually impaired person persons: UNADEV based in Lyon.

Recquired background :

  • Mechanical design​

Sections : SMT IMT or other interested
Contact email : charles.baur@epfl.ch

Test bench for load cell with micro-millinewton measurements

Test BenchThe project focuses on designing and assembling the test bench, for a new load cell that is being developed in a joined project of Instant Lab and the industrial partner. The load cell will be designed for measuring wide ranges of forces (micro-millinewtons), with maximum precision, due to the stiffness tuning mechanism. The goal of the project is to develop a test bench allowing to calibrate and characterize the prototype within given specification.

Preferred background/interest:

  • Mechanical design
  • Precise positioning
  • Force sensing

Sections : SMT IMT or other interested
Contact email : michal.smreczak@epfl.ch

Electronic inclinometer

inclinometerThe goal of the project is to work on the functionalities of the electrical inclinometer prototype developed at Instant-Lab. This device can measure precisely its position in 3 angular coordinates. Within the work, the reference system has to be developed. Thanks to such referencing, the relative angles between two given positions could be measured. The solution should be intuitive and handy.

Preferred background/interest:

  • Microcontroller programming in C
  • IMU sensors
  • Electrical design
  • Prototyping

Sections : SMT IMT or other interested
Contact email : michal.smreczak@epfl.ch

Flexure-based seismograph

The goal of the project is to design a two degree-of-freedom seismograph using the oscillators developed at Instant lab. These oscillators have a high quality factor due to the flexure technology used, which leads to a high sensitivity to external vibrations. There is a demand for seismographs to monitor buildings during or after an earthquake, which are more simple and less expensive than the instruments currently used. This project could lead to promising solutions in terms of sensitivity and cost-effectiveness.

Required background / interest :

  • Motivated and autonomous
  • Mechanical design
  • Vibration mechanics
  • Sensors and data processing

Sections : SMT SGM or other interested
Contact email : etienne.thalmann@epfl.ch

Rehabilitation insole for progressive weight application

sole

This mechatronics project is focused on the design of an insole for the rehabilitation of a broken leg or an sprained ankle. When the patient is once again capable of walking, he/ she must progressively increase the weight exerted to the broken structure in order to recover faster and better. Nevertheless, the patient is not able to monitor the applied weight without a force sensor. For this reason, the proposed insole will not only reduce the stiffness of the gait but also measure the force exerted by each leg and render it to the patient mobile phone. At the end, the patient will have a complete system which will warn him/ her against an excess of weight application.

This project is developed with the collaboration of medical partners.

Project consists of :

  • Continue the development of the mobile application, which monitors forces and interacts with patient and/or medical staff, in iOS/Swift.
  • Design the communication by bluetooth LE between the mobile phone and the microcontroller.
  • Export, store and import data from a remote sever to the mobile phone.

Required background / interest :

  • Motivated and self-governing.
  • Programming skills in Swift.
  • Kwonledge of Bluetooth Low Energy.
  • Basic electronics and microcontroller programming.

Location : Microcity, Neuchâtel
Sections : SMT IMT or other interested
Contact email : Please send CV in English or French to marine.clogenson@epfl.ch

Test and calibration of a nanoforce sensor

A new generation of sensor for biological application has been developed and manufactured out of glass. This very sensitive sensor aims at measuring force in the nanonewton range and therefore is using compliant structures. Next step consists in the solution evaluation and validation. For this project, a test bench should be designed and realized.

Sections : SMT SGM or other interested
Contact email : thomas.fussinger@epfl.ch

Watchmaking assembly at the millimetre scale

This project is a study of watch component assembly at the millimetre scale using new techniques from MEMS and innovative materials. This project also requires a study of the difficulties involved at the interfaces between new and traditional components. This project could have direct applications to the watch industry.

Sections : SMT IMT or other interested
Contact email : ilan.vardi@epfl.ch

Flexure based surgical tool

Growing life expectancy goes together with improvement of healthcare. New threatment methods are becoming less invasive, allowing for shorter recovery time. Following this trend we would like to propose a new micro-surgical tool.

Project will focus on development of flexible structure for flexture based surgical tool. It will allow for 2DoF of rotations. End effector integrated in such flexure will be a gripper, or other depending on medical application.

Whole structure should be open for either manual or robotic actuation.

Required background :

  • Mechanical design

Sections : SMT IMT or other interested
Contact email : charles.baur@epfl.ch

Flexure based tool improvement for reduced fingers strength

People with certain neurological pathologies such as MS, ALS or cerebral stroke have often difficulties to manipulate tools that require a voluntary extension (opening) of the hand such as scissors or pliers.

The goal of this project is to develop a mechanism that can be added to any of these tools to simplify their manipulation. Fist prototypes will be realized using the lab’s 3D printer and laser cutter as well as external resources.

Sections : SMT IMT or other interested
Contact email : roland.bitterli@epfl.ch

Force/displacement transducer using flexible structures

This project focuses on development of force sensors for surgical applications. It requires different kinematics, sizes and force ranges depending on application. Goal of this project would be to develop such a transducer for one of them using flexible structures.

Project consists of :

  • Conception of flexible structure
  • Dimensioning (calculations and finite elements method)
  • Test campaign

Required background :

  • Mechanical design
  • Matlab would be a plus, but is not required

Sections : SMT IMT or other interested
Contact email : sebastian.fifanski@epfl.ch

Micro-Torque test bench validation

Recently conducted master project lead to development of micro-torque measurement bench. Main application would be to measure the torque of bearings used in watchmaking. Within this project student will validate the test-bench, perform measurements, evaluate the test bench an propose improvements in the design.

Required background :

  • Mechanical design
  • LabView would be a plus, but is not required

Sections : SMT IMT or other interested
Contact email : sebastian.fifanski@epfl.ch

Oscillateur mécanique alimenté par la lumière

This project concerns the use of electromagnetic waves as an energy source to maintain high quality mechanical oscillators and the display of time.

Sections : SMT IMT or other interested
Contact email : etienne.thalmann@epfl.ch

Capteur de couple ultrasensible pour caractérisation de paliers horlogers

Le but de ce projet est de concevoir un banc de test pour mesurer les couples de frottement des micro-roulements à billes en fonction des charges axiales et radiales, ainsi que de la vitesse angulaire (en particulier à très basse vitesse). Les performances des paliers à roulement seront comparées à celles des paliers sur pierres. Le banc sera conçu de manière à ce que la mesure ne soit pas influencée par les couples de frottements des dentures). Ce projet se déroule en collaboration avec un partenaire industriel.

Le projet se déroule sur le site de Neuchâtel (Microcity). Un dédommagement est prévu pour compenser les frais de déplacement de Lausanne à Neuchâtel.

Sections : SMT IMT or other interested
Contact email : ilan.vardi@epfl.ch

Intégration de fonctionnalités d’assemblage dans les bagues de roulements à billes miniatures

L’assemblage de roulements à billes miniature est une opération délicate en raison de l’effet des tolérances sur les jeux fonctionnels du roulement. De plus le démontage de tels paliers est difficile. Le but de ce projet et d’inventer des bagues de roulements qui intègrent des fonctionnalités d’assemblage, en exploitant par exemple la technologie des guidages flexibles. De telles baguent devront relaxer les tolérances requises, faciliter le montage et le démontage et des roulements et éventuellement réduire la transmission de bruit acoustique. Ce projet se déroule en collaboration avec un partenaire industriel.

Le projet se déroule sur le site de Neuchâtel (Microcity). Un dédommagement est prévu pour compenser les frais de déplacement de Lausanne à Neuchâtel.

Sections : SMT IMT or other interested
Contact email : ilan.vardi@epfl.ch

Outil pour Mibot avec mesure de force

Un Mibot est un minirobot (voir www.imina.ch pour plus d’information) pour lequel il s’agit de développer un outil de type sonde (aiguille manipulée par le robot) capable de mesurer les forces de contact ‘aiguille – environnement’. Le but du projet est de proposer une aiguille incluant une structure flexible à même de transformer les forces en un déplacement et de mesurer ce déplacement à l’aide d’un système dédié (interféromètre à lumière blanche). Il s’agira de concevoir une telle aiguille, de la réaliser et, idéalement, de la caractériser. Ce projet se basera sur l’expertise acquise dans le cadre de développements Medtech de l’Instant-Lab (aiguille de perfusion, crochet chirurgical, etc, avec capacité de mesure de force à l’extrémité). Ce projet se fera en collaboration avec la société Imina.

Required background :

  • Mechanical design

Sections : SMT IMT or other interested
Contact email : charles.baur@epfl.ch

Instant-Lab in the media

Media coverage of the IsoSpring project

 

Media echo to the presentation of the IsoSpring clock in the freshly renovated Neuchâte town hall on December 16, 2016.

Révue FH 19.01.2017

Articles in the press concerning the presentation of IsoSpring at the “Journée d’étude de la Société Suisse de Chronométrie”,  Sept 17, 2014.

orologi.forumfree.it/ [Italian] pdf

PuristSPro [English] pdf

journal.hautehorlogerie.org [French] pdf

www.thewatches.tv [English]

www.davincitech.it [Italian] pdf

www.engadget.com [English] pdf

phys.org [English] pdf

www.technologist.eu/ [English] pdf

www.ablogtowatch.com [English]

 

Article published in L’EXPRESS – L’IMPARTIAL on the inauguration day of the Microcity building: A l’assaut du tic-tac horloger, 2014-05-08

ExpressMicrocity8mai2014.pdf

 

Publications

Le sens de la recherche

C. Forestier-Kasapi; I. Vardi

Bulletin de la Société Suisse de Chronométrie. 2018-12-01.

SYSTEME MULTISTABLE PROGRAMMABLE

M. G. A. A. Zanaty

2018-01-10.

Patent number(s) :
EP3266737A1

Flexure-Pivot Oscillator Restoring Torque Nonlinearity and Isochronism Defect

E. Thalmann; M. H. Kahrobaiyan; S. Henein

2018. Volume 5A: 42nd Mechanisms and Robotics Conference , Quebec City, Quebec, Canada , August 26–29, 2018. p. V05AT07A013.

DOI : 10.1115/DETC2018-85863.

Programmable Multistable Mechanisms: Design, modeling, characterization and applications

M. G. A. A. Zanaty / S. N. Henein; I. Vardi (Dir.)

Lausanne, EPFL, 2018.

DOI : 10.5075/epfl-thesis-9055.

Multistable Mechanisms are mechanical devices having more than one stable state. Since these mechanisms can maintain different deformations with zero force, they are advantageous for low power environments such as wristwatches and medical devices. In this thesis, I introduce programmable multistable mechanisms (PMMs), a new family of multistable mechanisms where the number, position, and stiffness of stable states can be controlled by programming inputs modifying the boundary conditions. PMMs can be synthesized by combining bistable mechanisms. This method was used to produce the T-mechanism, a PMM consisting of two double parallelogram mechanisms (DPMs) connected orthogonally where each DPM consists of two parallel beams connected centrally by a rigid block and axially loaded by programming input. An analytical model based on Euler-Bernoulli beam theory was derived to describe qualitatively the stability behaviour of the T-mechanism. The model approximates the mechanism's stiffness by a sixth order polynomial from which the reaction force and strain energy expressions can be estimated. These explicit formulas provide analytical expressions for the number, position, and stiffness of stable and unstable states as functions of the programming inputs. The qualitative stability behavior was represented by the programming diagram, bifurcation diagrams and stiffness maps relating the number, position and stiffness of stable states with the programming inputs. In addition, I showed that PMMs have zero stiffness regions functioning as constant-force multistable mechanisms. Numerical simulations validated these results. Experimental measurements were conducted on the T-mechanism prototype manufactured using electro-discharge machining. An experimental setup was built to measure the reaction force of the mechanism for different programming inputs. I verified the possible configurations of the T-mechanism including monostability bistability, tristability, quadrastability, zero stiffness regions, validating my analytical and numerical models. Compared to classical multistable mechanisms which are displaced between their stable states by imposing a direct displacement, PMMs can be displaced by modifying mechanism strain energy. This property increases the repeatability of the mechanism as the released energy is independent of the driving parameters, which can be advantageous for mechanical watches and medical devices. Accurate timekeepers require oscillators having repeatable period independent of their energy source. However, the balance wheel spiral spring oscillator used in all mechanical watches, suffers from isochronism defect, i.e., its oscillation period depends on its amplitude. I addressed this problem by introducing novel detached constant force escapements for mechanical wristwatches based on PMMs. In the medical domain, I applied PMMs to construct a retinal vein cannulation needle for the treatment of retinal vein occlusion. PMMs based needles produce sufficient repeatable puncturing energy with a predefined stroke independent of the operator input. Numerical simulations were used to model and dimension our proposed tool and satisfy the strict requirements of ophthalmologic operations. The tool was manufactured using 3D femto-laser printing of glass. An experimental setup was built to characterize the tool's mechanical behavior and to verify my computations. The tool was applied successfully to cannulate retinal veins of pig eyes.

Programmable Multistable Mechanisms: Synthesis and Modeling

M. Zanaty; I. Vardi; S. Henein

JOURNAL OF MECHANICAL DESIGN. 2018.

DOI : 10.1115/1.4038926.

Gravity-Insensitive Flexure Pivot Oscillators

M. H. Kahrobaiyan; E. Thalmann; L. Rubbert; I. Vardi; S. Henein

Journal of Mechanical Design. 2018.

DOI : 10.1115/1.4039887.

Classical mechanical watch plain bearing pivots have frictional losses limiting the quality factor of the hairspring-balance wheel oscillator. Replacement by flexure pivots leads to a drastic reduction in friction and an order of magnitude increase in quality factor. However, flexure pivots have drawbacks including gravity sensitivity, nonlinearity, and limited stroke. This paper analyzes these issues in the case of the cross-spring flexure pivot (CSFP) and presents an improved version addressing them. We first show that the cross-spring pivot cannot be simultaneously linear, insensitive to gravity, and have a long stroke: the 10 ppm accuracy required for mechanical watches holds independently of orientation with respect to gravity only when the leaf springs cross at 12.7% of their length. But in this case, the pivot is nonlinear and the stroke is only 30% of the symmetrical (50% crossing) crossspring pivot’s stroke. The symmetrical pivot is also unsatisfactory as its gravity sensitivity is of order 104 ppm. This paper introduces the codifferential concept which we show is gravity-insensitive. It is used to construct a gravity-insensitive flexure pivot (GIFP) consisting of a main rigid body, two codifferentials, and a torsional beam. We show that this novel pivot achieves linearity or the maximum stroke of symmetrical pivots while retaining gravity insensitivity.

Horloge neuchâteloise du XXIe siècle équipée de l’oscillateur IsoSpring

S. Henein; I. Vardi

Chronométrophilia. 2018.

Echappements à impulsion virtuelle

I. Vardi; R. A. Bitterli; L. Convert; E. Thalmann; S. Henein

Bulletin de la Société Suisse de Chronométrie. 2018.

L’échappement à détente est reconnu pour sa performance chronométrique, mais il n’est pas sécurisé pour la montre-bracelet. Plusieurs échappements ont été proposés pour adapter cet échappement à la montre, dont l’échappement Robin récemment sécurisé par Audemars Piguet. George Daniels a poursuivi une démarche qui a mené à l’échappement coaxial. Nous proposons un nouveau concept, l’impulsion virtuelle, qui pourrait réunir tous les avantages de ces échappements. Notre solution est une simple modification de l’échappement Robin, nous ajoutons seulement une dent d’impulsion indirecte. Le principe de l’impulsion virtuelle consiste en une impulsion indirecte qui ne se fait qu’à l’arrêt et à faible amplitude. Ceci ajoute la contrainte du double coup, donc sécurise, et assure l’auto-démarrage. Un tracé et un démonstrateur ont été réalisés. Des observations du démonstrateur, à l’aide d’une caméra haute vitesse, démontrent la validité du concept de l’impulsion virtuelle.

Theory and design of spherical oscillator mechanisms

I. Vardi; L. Rubbert; R. Bitterli; N. Ferrier; M. Kahrobaiyan et al.

Precision Engineering. 2018.

DOI : 10.1016/j.precisioneng.2017.10.005.

In previous work, we showed that two degree of freedom oscillators can be advantageously applied to horological time bases since they can be used to eliminate the escapement mechanism. We subsequently examined planar two degree of freedom oscillators based on parallel flexure stages. We noted that these oscillators are strongly affected by the orientation of gravity so are not directly suitable for portable timekeepers such as wristwatches. In this paper we examine the design and performance of two degree of freedom spherical oscillators. By spherical oscillator, we mean a spherical mass having purely rotational kinematics and subject to elastic restoring torque. As opposed to our previously examined oscillators, the oscillation period of spherical oscillators is relatively insensitive to the effect of tilting the mechanism in the presence of gravity. In order to restrict spherical rotation to two degrees of freedom, we restrict the kinematics to obey Listing's law, a well–known constraint occurring in human eye movement. We show that a particular central restoring force we call the scissors law is best suited for chronometric performance and propose a number of theoretical mechanisms producing it. We then design an actual spherical oscillator based on our theoretical results. The design uses flexure springs to restrict kinematics to Listing's Law, produce the scissors law and provide the necessary suspension. Finally, we present experimental data based on a physical realization indicating promising chronometric performance.

VivoForce instrument for retinal microsurgery

S. K. Fifanski; J. Rivera; M. Clogenson; C. Baur; A. Bertholds et al.

2017. Surgetical 2017 , Strasbourg, France , November 20-22, 2017. p. 155-157.

The Art of Flexure Mechanism Design

F. Cosandier; S. Henein; M. Richard; L. Rubbert

Lausanne: EPFL Press.

Flexure mechanism design is an art, and this book provides the theoretical and practical foundation for scientists and engineers to express their creativity in this field. Flexure mechanisms, also known as compliant mechanisms, rely on the elasticity of matter to provide motion to mechanism linkages. Flexure mechanisms eliminate the disadvantages of classical joints: friction, wear, lubrication and play, while permitting monolithic design. Flexure-based mechanisms have gained prominence in a wide variety of fields including robotics, surgical instrumentation, aerospace, astronomy, particle accelerators, metrology and horology. This book establishes a conceptual framework for the design of flexure-based articulated structures. Topics featured deal with the theoretical foundations for the design of translational and rotational flexures, the simple kinematic analysis of flexure-based mechanisms, and advanced kinematic approaches to the design of complex flexure-based mechanisms using modules in parallel or serial arrangements. The book also features detailed examples of long stroke flexure mechanisms used in metrology applications, and a detailed example of planar flexure mechanisms having out of plane functionality and used in surgical applications. This book aims to provide scientists and engineers with a conceptual tool, an analytic methodology and the key references for their precision engineering needs.

Higher-order continuation method for the rigid-body kinematic design of compliant mechanisms

L. Rubbert; I. Charpentier; S. Henein; P. Renaud

Precision Engineering-Journal Of The International Societies For Precision Engineering And Nanotechnology. 2017.

DOI : 10.1016/j.precisioneng.2017.06.021.

Compliant mechanisms are of great interest in precision engineering. In this paper we propose a higher order continuation method to help their rigid-body kinematic design. The method helps to investigate the choice of a mechanism configuration through the whole exploration of the workspace, and eases the kinematic analysis to avoid, or take advantage of, the vicinity of kinematic singularities. Such approach is relevant for planar and quasi-planar mechanisms that can be obtained with micro-manufacturing processes adapted to precision applications. The higher-order continuation method allows for a direct and accurate plotting of the input-output relationship of any mechanism by considering only its geometrical closed-loop equations, i.e. without the complex derivation of any analytical model. We show that these plots, called bifurcation diagrams, reveal essential information such as the joint velocity profile and the presence of singular configurations. Moreover, the continuous and accurate computation of the mechanism configuration in the vicinity of singularities provides detailed information about the kinematic behavior of the mechanism in its extreme positions. For the design of compliant mechanisms, the designer can advantageously use the bifurcation diagrams to evaluate the relevance of the selected mechanism, then to identify a configuration in order to obtain desired kinematic properties without the derivation of the inverse kinematic model (IKM). or the direct kinematic model (DKM). The method is exemplified with a 3 universal-joint and 3 spherical-joint mechanism (3-US), the IKM and DKM of which cannot be derived analytically. The latter has a large workspace and special kinematic behaviors consisting of a screw-like motion and a platform gyration, which have not been studied before and could lead to novel compliant devices. (C) 2017 Elsevier Inc. All rights reserved.

Une horlogerie mécanique sans tic-tac

S. Henein; I. Vardi

Pour la Science. 2017.

La R&D commune entreprises-université dans l'industrie horlogère de 1900 à nos jours

P.-Y. Donzé; I. Vardi; S. Henein

Bulletin de la Société Suisse de Chronométrie. 2017.

Gravity insensitive flexure pivots for watch oscillators

M. Kahrobaiyan; L. Rubbert; I. Vardi; S. Henein

2016. Congrès International de Chronométrie CIC 2016 , Montreux, Switzerland , September 28-29, 2016. p. 49-55.

Classical pivots have frictional losses leading to the limited quality factor of oscillators used as time bases in mechanical watches. Flexure pivots address these issues by greatly reducing friction. However, they have drawbacks such as gravity sensitivity and limited angular stroke. This paper analyses these problems for the cross-spring flexure pivot and presents an improved version addressing these issues. We first show that the cross spring pivot cannot be both insensitive to gravity and have a long stroke. A 10 ppm sensitivity to gravity acceptable for watchmaking applications occurs only when the leaf springs cross at about 87.3 % of their length, but the stroke is only 30.88 % of the stroke of the symmetrical cross-spring pivot. For the symmetrical pivot, gravity sensitivity is of the order of 104 ppm. Our solution is to introduce the co-differential concept which we show to be gravity insensitive. We then use the co-differential to build a gravity insensitive flexure pivot with long stroke. The design consists of a main rigid body, two co-differentials and a torsional beam. We show that our pivot is gravity insensitive and achieves 100 % of the stroke of symmetrical pivots.

Investigating The Size-Dependent Static And Dynamic Behavior Of Circular Micro-Plates Subjected To Capillary Force

M. H. Kahrobaiyan; I. Vardi; M. T. Ahmadian; S. Henein

2016. ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference', u'ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference'] , Boston, USA , August 21-24, 2016. p. V004T09A008.

The size-dependent static deflection, pull-in instability and resonant frequency of a circular microplate under capillary force have been studied using modified couple stress elasticity theory. SiZe-dependency is a phenomenon in which the normalized quantities that classical elasticity theory predicts to be independent of the structure size, such as normalized deflection or normalized frequency, vary significantly as the structure size changes. This phenomenon has been observed in micro-scale structures such as micro-electro-mechanical-systems (MEMS). Since classical elasticity theory is unable to predict the size-dependency, non-classical elasticity theories such as modified couple stress theory have been developed recently. In this paper, modified couple stress theory is used for the first time to develop the governing equation and boundary conditions of circular microplates when subjected to capillary force. Consideration of capillary force is important since it is has a significant role in the mechanical behavior and stability of micro-scale structures in the presence of a liquid bridge. We investigated the static deflection and pull-in instability of microplates using the Galerkin method to assess the effect of size-dependency for static deflection. We observed that, as the ratio of the microplate thickness to length scale parameter (an additional material property suggested in modified couple stress theory to capture the size-dependency) decreases, the normalized deflection of the microplate also decreases. We further observed that the difference between the normalized deflection predicted by classical elasticity theory and the one evaluated using modified couple stress theory is significant when thickness of the microplate is small, but diminishes as thickness increases. Furthermore, we defined a dimensionless number called the dimensionless capillary tension (DCT) as a function of the mechanical, geometrical and size-dependent properties of the microplate as well as the characteristics of the liquid bridge such as the contact angle and the interfacial tension. We showed that for DCT values greater than a threshold evaluated in this paper, pull-in instability happens and the microplate collapses to the substrate. Moreover, we evaluated the size-dependent resonant frequency of the microplate under capillary force as a function of the DCT and obtained the result that the frequency decreases as DCT increases. In addition, our investigation of size-dependency revealed that as the ratio of the microplate thickness to length scale parameter increases, the frequency decreases in a way that for large values of, the ratio, it asymptotically approaches the value predicted by classical elasticity theory.

Force sensitive hook for epiretinal membrane peeling in eye surgery

S. Fifanski; J. Rivera; C. Baur

Swiss MedTech Day, Berne, Switzerland, June 7, 2016.

This project addresses the design, construction and evaluation of a peeling hook with force measurement capability for in-vivo intra-ocular vitreoretinal surgery. The force sensor consists of a miniature multi-degree-offreedom flexure where deformations induced by contact forces are measured using optical fiber white light interferometry. This instrument will be used for epiretinal membrane peeling procedures and should then lead to the creation of a new generation of force sensitive surgical tools.

Flexure-based multi-degrees-of-freedom in-vivo force sensors for medical instruments

S. K. Fifanski; J. L. Rivera Gutiérrez; M. Clogenson; C. Baur; A. Bertholds et al.

2016. Euspen's 16th International Conference , Nottingham, Great Britain , May 30-Jun 03, 2016. p. 333-334.

This paper presents novel multi-degrees-of-freedom force sensors based on flexures used as mecano-optical transducers (named flexure body) and white light interferometers used as opto-electrical transducers. Together, these transducers make up a load cell exploiting the nanometric accuracy of Fabry-Pérot interferometric measurement to reach milli-Newton force accuracy. The design focuses on the flexure body composed of three sections: a base (attached to the measuring device), a compliant section which deforms under applied forces and a pointed rigid section whose tip touches tissues during surgery. The fiber interferometer measures the distal displacement with respect to the base using one 125 μm diameter optical fiber for each load cell DOF. The key advantages of this design are: compact design (1 to 4 mm diameter shaft), simple optical alignment during assembly, scalability from Newton down to milli-Newton force levels, insensitivity to electrical charge and compatibility with sterilization procedure. These properties satisfy the requirements of in-vivo force measurements during surgery. The paper presents analytical stiffness estimation of 1 DOF flexure bodies and finite element stiffness analysis of multiple-DOF structures followed by the design, manufacturing and assembly process. The realized sensors are then characterized experimentally on a specifically designed motorized test-bench, which allows application of calibrated forces from various directions onto the senor tip. A specific calibration strategy was developed improving measurement accuracy of the sensor.

Design, analysis, testing and applications of two-body and three-body kinematic mounts

J. R. C. G. Kruis / S. N. Henein; F. Cosandier (Dir.)

Lausanne, EPFL, 2016.

DOI : 10.5075/epfl-thesis-7005.

Kinematic couplings are used when two rigid bodies need to be repeatedly and accurately positioned with respect to each other. They allow for sub-micron positioning repeatability by suppressing play and reducing strains in the bodies. Typical applications are lens mounts, work piece mounts and docking interfaces for astrophysics, semiconductor and metrology applications. This thesis generalizes the well-known concept of two-body kinematic couplings to three-body kinematic mounts. The goal of the thesis is: To pave the way for high precision assembly using kinematic mounts by providing an exhaustive catalogue of all twobody and three-body kinematic mounts and to test key configurations experimentally. The main contributions of this thesis are: - State of the art survey of essential knowledge in the field of kinematic couplings. - Rigorous problem statement for the design of two-body and three-body kinematic mounts. - Rigorous limitation of the scope of research to three-body kinematic mounts whose contact points lie exclusively on three convergent orthogonal lines and whose constraint lines are parallel to these lines. - An exhaustive catalogue of three-body kinematic mounts consisting of seven configurations in 3D and nine configurations in 2D. - An exhaustive set of four conditions satisfied by three-body 3-dimensional kinematic mounts. - An exhaustive set of seven conditions satisfied by three-body 2-dimensional kinematic mounts. - Realization of a two-body kinematic mount and a three-body kinematic mount in metal, and precise measurement of their positioning accuracy on a 3D coordinate measurement machine at the Swiss Federal Institute of Metrology. Positioning error of 0.2 microns and 5 micro­radian achieved with two-body kinematic mounts. Positioning error of 1 micron and 50 microradian achieved with three-body kinematic mounts. - Realization of three-body kinematic mounts in Silicon by Deep Reactive Ion Etching processes (DRIE) and experimental measurement of their positioning error. - Physical implementation of nesting forces and assembly methods allowing for the physical construction of kinematic mounts. - Physical realizations in robotics, optics and aerospace using our new kinematic mounts.

Investigation of Size-Dependency in Free-Vibration of Micro-Resonators Based on the Strain Gradient Theory

R. Vatankhah; M. H. Kahrobaiyan

Latin American Journal Of Solids And Structures. 2016.

DOI : 10.1590/1679-78252430.

This paper investigates the vibration behavior of micro-resonators based on the strain gradient theory, a non-classical continuum theory capable of capturing the size effect appearing in micro-scale structures. The micro-resonator is modeled as a clamped-clamped micro-beam with an attached mass subjected to an axial force. The governing equations of motion and both classical and non-classical sets of boundary conditions are developed based on the strain gradient theory. The normalized natural frequency of the micro-resonator is evaluated and the influences of various parameters are assessed. In addition, the current results are compared to those of the classical and modified couple stress continuum theories.

Refraction limit of miniaturized optical systems: a ball-lens example

M.-S. Kim; T. Scharf; S. Mühlig; M. Fruhnert; C. Rockstuhl et al.

Optics Express. 2016.

DOI : 10.1364/OE.24.006996.

We study experimentally and theoretically the electromagnetic field in amplitude and phase behind ball-lenses across a wide range of diameters, ranging from a millimeter scale down to a micrometer. Based on the observation, we study the transition between the refraction and diffraction regime. The former regime is dominated by observables for which it is sufficient to use a ray-optical picture for an explanation, e.g., a cusp catastrophe and caustics. A wave-optical picture, i.e. Mie theory, is required to explain the features, e.g., photonic nanojets, in the latter regime. The vanishing of the cusp catastrophe and the emergence of the photonic nanojet is here understood as the refraction limit. Three different criteria are used to identify the limit: focal length, spot size, and amount of crosspolarization generated in the scattering process. We identify at a wavelength of 642 nm and while considering ordinary glass as the ball-lens material, a diameter of approximately 10 μm as the refraction limit. With our study, we shed new light on the means necessary to describe micro-optical system. This is useful when designing optical devices for imaging or illumination.

Flexure-based multi-degree-of-freedom force and torque sensors at the milimeter scale for medical instruments

S. Fifanski

Summer School in Surgical Robotics, Montpellier, France, Sep 7-11, 2015.

TIMEPIECE OSCILLATOR

S. Henein; I. Kjelberg

2015.

Patent number(s) :
US 9,207,641 B2

Mathematics, the Language of Watchmaking

I. Vardi

Watch Around. 2015.

Mathématiques et horlogerie

I. Vardi

Watch Around. 2015.

Guidages flexibles

S. Henein

La Revue POLYTECHNIQUE. 2015.

Analyse, synthèse et création d’échappements horlogers par la théorie des engrenages

O. Laesser; S. Henein

Journée d'études de la Société Suisse de Chronométrie SSC, Lausanne. Switzerland, September 16, 2015.

Nous présentons la méthode du tracé primitif développée par le premier auteur dans sa thèse de doctorat. Cette nouvelle méthode donne pour la première fois une approche systématique à la problématique du tracé d’un échappement horloger. Elle revient à considérer chacune des phases cinématiques d’un échappement comme une transmission par engrenages. Puisque les engrenages sont décrits par leurs cercles primitifs, il s’ensuit que le fonctionnement d’un échappement peut être décrit par l’ensemble des arcs de cercles primitifs de ses différentes phases que nous appelons tracé primitif de l’échappement. L’étude des échappements au travers de leur tracé primitif a plusieurs implications : le tracé d’un échappement devient systématique grâce à cette formalisation du concept de tracé ; inversement, des échappements peuvent être facilement dessinés en partant d’un tracé primitif donné. C’est ainsi qu’un nouvel échappement dit « à double impulsion primitive » a été inventé. Cet échappement a été construit et ses performances sont prometteuses.

The Geometry of Eye Movement Dynamics

S. Henein; I. Vardi

2015. The 18th European Conference on Eye Movements 2015 , Vienna, Austria , August 16-21, 2015. p. 65.

Eye movements consist of spherical rotations, with orientation generally constrained by Listing’s law. Our main result is a complete explicit formulation of ballistic eye movement under the Listing constraint. We present a conceptual framework for eye movement bas-ing the dynamics of Listing motion on the equator of the sphere of unit quaternions, which we call the Listing sphere. Analytical dynamics shows that ballistic Listing motion corre-sponds to free particle motion on the Listing sphere. Thus, ballistic Listing movement is greatly simplified by transposition to the Listing sphere, where it consists of shortest dis-tance trajectories. This proves that ballistic eye motion consists of constant speed rotation along circles passing through the occipital point. The relevance of the occipital point in eye movement was already noted by Helmholtz, which we explain by the fact that it cor-responds to the equator of the Listing sphere. We designed a physical mechanism produc-ing the correspondence between eye movement and particle motion on the Listing sphere. Our straightforward description of ballistic eye motion under the pure Listing kinematic constraint serves as a useful idealized benchmark in the study of actual physiological eye movements, whose orientations are known to deviate slightly from the Listing constraint.

Isotropic springs based on parallel flexure stages

L. Rubbert; R. A. Bitterli; N. Ferrier; S. K. Fifanski; I. Vardi et al.

Precision Engineering-Journal Of The International Societies For Precision Engineering And Nanotechnology. 2015.

DOI : 10.1016/j.precisioneng.2015.07.003.

We define isotropic springs to be central springs having the same restoring force in all directions. In previous work, we showed that isotropic springs can be advantageously applied to horological time bases since they can be used to eliminate the escapement mechanism [7]. This paper presents our designs based on planar serial 2-DOF linear isotropic springs. We propose two architectures, both based on parallel leaf springs, then evaluate their isotropy defect using firstly an analytic model, secondly finite element analysis and thirdly experimental data measured from physical prototypes. Using these results, we analyze the isotropy defect in terms of displacement, radial distance, angular separation, stiffness and linearity. Based on this analysis, we propose improved architectures stacking in parallel or in series duplicate copies of the original mechanisms rotated at specific angles to cancel isotropy defect. We show that using the mechanisms in pairs reduces isotropy defect by one to two orders of magnitude. (C) 2015 The Authors. Published by Elsevier Inc.

GENERAL 2 DEGREE OF FREEDOM ISOTROPIC HARMONIC OSCILLATOR AND ASSOCIATED TIME BASE WITHOUT ESCAPEMENT OR WITH SIMPLIFIED ESCAPEMENT

S. Henein; I. Vardi; L. Rubbert

2015.

Patent number(s) :
EP3095010
EP3095011
US2016327909
US2016327910
WO2015104692
WO2015104693
WO2015104692
WO2015104693
EP2894521
CN106462105

The mechanical isotropic harmonic oscillator comprises at least a two degrees of freedom linkage supporting an orbiting mass with respect to a fixed base with springs having isotropic and linear restoring force properties wherein the mass has a tilting motion. The oscillator may be used in a timekeeper, such a watch.

XY ISOTROPIC HARMONIC OSCILLATOR AND ASSOCIATED TIME BASE WITHOUT ESCAPEMENT OR WITH SIMPLIFIED ESCAPEMENT

S. Henein; I. Vardi; L. Rubbert

2015.

Patent number(s) :
EP3095010
EP3095011
US2016327909
US2016327910
WO2015104692
WO2015104693
WO2015104692
WO2015104693
EP2894521
CN106462105

The mechanical isotropic harmonic oscillator comprises at least a two degree of freedom linkage supporting an orbiting mass with respect to a fixed base with springs having isotropic and linear restoring force properties. The oscillator may be used in a timekeeper, such as a watch.

Solid on liquid deposition, a review of technological solutions

A. Homsy; E. Laux; L. Jeandupeux; J. Charmet; R. Bitterli et al.

Microelectronic Engineering. 2015.

DOI : 10.1016/j.mee.2015.03.068.

Solid-on-liquid deposition (SOLID) techniques are of great interest to the MEMS and NEMS (Micro- and Nano Electro Mechanical Systems) community because of potential applications in biomedical engineering, on-chip liquid trapping, tunable micro-lenses, and replacements of gate oxides. However, depositing solids on liquid with subsequent hermetic sealing is difficult because liquids tend to have a lower density than solids. Furthermore, current systems seen in nature lack thermal, mechanical or chemical stability. Therefore, it is not surprising that liquids are not ubiquitous as functional layers in MEMS and NEMS. However, SOLID techniques have the potential to be harnessed and controlled for such systems because the gravitational force is negligible compared to surface tension, and therefore, the solid molecular precursors that typically condense on a liquid surface will not sediment into the fluid. In this review we summarize recent research into SOLID, where nucleation and subsequent cross-linking of solid precursors results in thin film growth on a liquid substrate. We describe a large variety of thin film deposition techniques such as thermal evaporation, sputtering, plasma enhanced chemical vapor deposition used to coat liquid substrates. Surprisingly, all attempts at deposition to date have been successful and a stable solid layer on a liquid can always be detected. However, all layers grown by non-equilibrium deposition processes showed a strong presence of wrinkles, presumably due to residual stress. In fact, the only example where no stress was observed is the deposition of parylene layers (poly-para-xylylene, PPX). Using all the experimental data analyzed to date we have been able to propose a simple model that predicts that the surface property of liquids at molecular level is influenced by cohesion forces between the liquid molecules. Finally, we conclude that the condensation of precursors from the gas phase is rather the rule and not the exception for SOLID techniques. (C) 2015 The Authors. Published by Elsevier B.V.

A statistical shape model of the human second cervical vertebra

M. Clogenson; J. M. Duff; M. Luethi; M. Levivier; R. Meuli et al.

International Journal Of Computer Assisted Radiology And Surgery. 2015.

DOI : 10.1007/s11548-014-1121-x.

Statistical shape and appearance models play an important role in reducing the segmentation processing time of a vertebra and in improving results for 3D model development. Here, we describe the different steps in generating a statistical shape model (SSM) of the second cervical vertebra (C2) and provide the shape model for general use by the scientific community. The main difficulties in its construction are the morphological complexity of the C2 and its variability in the population. The input dataset is composed of manually segmented anonymized patient computerized tomography (CT) scans. The alignment of the different datasets is done with the procrustes alignment on surface models, and then, the registration is cast as a model-fitting problem using a Gaussian process. A principal component analysis (PCA)-based model is generated which includes the variability of the C2. The SSM was generated using 92 CT scans. The resulting SSM was evaluated for specificity, compactness and generalization ability. The SSM of the C2 is freely available to the scientific community in Slicer (an open source software for image analysis and scientific visualization) with a module created to visualize the SSM using Statismo, a framework for statistical shape modeling. The SSM of the vertebra allows the shape variability of the C2 to be represented. Moreover, the SSM will enable semi-automatic segmentation and 3D model generation of the vertebra, which would greatly benefit surgery planning.

Le facteur de qualité en horlogerie mécanique

I. Vardi

Société Suisse de Chronométrie. 2014-05-01.

Le facteur de qualité de l'oscillateur est reconnu comme étant la meilleure indication de précision d'un garde-temps et pour cette raison la "course à la haute fréquence" actuelle devrait être plutôt une "course à la haute qualité". Je présente la théorie du facteur de qualité de manière précise ainsi que des méthodes pour l'améliorer en fonction du frottement, la rigidité et la masse de l'oscillateur. Il est bien connu qu'une augmentation du facteur de qualité affecte la reprise de marche après un choc et je donne pour la première fois une estimation quantitative de la reprise de marche en terme du facteur de qualité. Je présente aussi la formule d'Airy pour l'erreur de l'échappement en fonction du facteur de qualité pour donner une estimation quantitative de l'amélioration chronométrique due à une augmentation de Q.

The value of Statistical Shape Models to Spine Surgery

M. Clogenson; J. M. Duff; M. Luethi; S. Kostrzewski; C. Baur

Shape 2014 : Symposium on Statistical Shape Models & Applications, Delémont, Suisse, June 11-13, 2014.

The increased use of 3D models of organs or bones by the surgeon has lead to rapid development of new methods to automaKze model generaKon.

Statistical Shape Model for robotic spine surgery

M. Clogenson; C. Baur

Winter Slicer Porject Week 2014 (NA-MIC), Salt Lake City, Utah, USA, January 6-10,2014.

The goal of the project is to generate a 3D model of the C2 cervical vertebra for surgery planning using an atlas-based segmentation technique. A Statistical Shape Model of the C2 vertebra has been created from 91 CT scans using Statismo [1], a toolkit for building PCA shape models

Optical measuring element having a single-piece structure

A. Bertholds; P. Llosas; S. Henein

2014.

Patent number(s) :
US8659762
EP2255170
US2010328675
EP2255170
WO2009114955

An optical measuring element measures forces at least one direction. The measuring element has a single-piece structure. There is an outside wall with notches introduced therein. Each notch defines parallel edges, and the notches define more or less elastically flexible zones in the structure and constitute the only connection between a first region and a second region of the structure. For optical distance measurement between the two regions of the structure, one or more optical fibers are each attached with one end thereof to a region of the structures such that reflective surfaces are located close to the ends. The reflective surfaces are firmly connected to another region. The optical fibers are disposed on the outside wall.

Analyse, synthèse et création d'échappements horlogers par la théorie des engrenages

O. Laesser / S. Henein; I. Vardi (Dir.)

Lausanne, EPFL, 2014.

DOI : 10.5075/epfl-thesis-6189.

In principle, knowledge of watch and clock escapements is acquired through the study of the geometry and operation of numerous realizations, studied patiently one after the other. Knowing the classics, one can hope to construct a new realizations by borrowing components from one or geometry from another. Currently, there is no formal model or systematic approach which permits any other method of learning escapements and creating new ones. The purpose of this thesis is fill this gap by describing a formal model which will provide a systematic approach to escapements. We will not limit ourselves to the study of the geometry and operation of fundamental escapements but will add a formalism which has only been partially used in the past, outlining gear tooth profiles. The operation of proposed escapements will thus be characterized by an abstract geometric shape called the primitive outline. As opposed to visible escapement geometry, primitive outlines differ very little from one escapement to the other, making them an excellent basis for escapement unification. After going from existing geometries to primitive outlines we will reverse course. The method of outlining gear tooth profiles will allow us, based on existing primitive outlines, to construct new escapements. We will push this method to create a new primitive outline which, according to traditional criteria, appears to have unprecedented efficiency.

IsoSpring : vers la montre sans échappement

S. Henein; I. Vardi; L. Rubbert; R. Bitterli; N. Ferrier et al.

Journée d'étude de la Société Suisse de Chronométrie, Lausanne, Suisse, September 17, 2014.

Depuis son introduction en 1675, le balancier-spiral est la base de temps exclusive de la montre mécanique. Or cet oscillateur présente deux difficultés limitatives qui n'ont jusqu'à présent pas été contournées : un facteur de qualité limité (en particulier par des phénomènes tribologiques), ainsi que la nécessité d'un échappement, mécanisme complexe au rendement limité. Cet article pré-sente un nouvel oscillateur appelé IsoSpring, qui améliore le facteur de qualité grâce au recours aux guidages flexibles et élimine complètement l'échappement. Le concept de ce nouvel oscillateur qui est doté de deux degrés de liberté remonte à Issac Newton. Il est replacé dans le contexte historique des principales avancées conceptuelles en horlogerie mécanique. La résolution des équa-tions du mouvement démontre que l'inertie desorganes tournants perturbe l'isochronisme. Pour pallier cette limitation, des architec-tures de mécanismes à guidages flexibles supprimant l'essentiel de l’inertie des organes tournants sont proposées. Le movement bidimensionnel de cet oscillateur n’est plus alterné, mais unidirectionnel. Ainsi, un mécanisme de maintien continu constitué d'une manivelle transmet le couple à l'oscillateur et l'échappement disparaît.

Using Singularities of Parallel Manipulators to Enhance the Rigid-Body Replacement Design Method of Compliant Mechanisms

L. Rubbert; S. Caro; J. Gangloff; P. Renaud

Journal of Mechanical Design. 2014.

DOI : 10.1115/1.4026949.

The rigid-body replacement method is often used when designing a compliant mechanism. The stiffness of the compliant mechanism, one of its main properties, is then highly dependent on the initial choice of a rigid-body architecture. In this paper, we propose to enhance the efficiency of the synthesis method by focusing on the architecture selection. This selection is done by considering the required mobilities and parallel manipulators in singularity to achieve them. Kinematic singularities of parallel structures are indeed advantageously used to propose compliant mechanisms with interesting stiffness properties. The approach is first illustrated by an example, the design of a one degree of freedom compliant architecture. Then, the method is used to design a medical device where a compliant mechanism with three degrees of freedom is needed. The interest of the approach is outlined after application of the method.

Masse oscillante idéale : CQFD

O. Laesser

2013. Congrès International de Chronométrie SSC , Montreux, Switzerland , September 25-26, 2013.

Dans les années 60, H. Kocher démontre que l'appareil Cyclotest accélère le remontage d'un système automatique d'un facteur parfaitement bien défini et précis par rapport à unporter réel. Ensuite, dans les années 70, A. Hoffmann s'attelle à la détermination des durées de remontage au Cyclotest par simulationnumérique. Il obtient des correspondances avec la pratique qui de son propre aveu ne sont "pas bonnes." Le but de cette étude est de fournir des résultats numériques compatibles avec la pratique. Partant des résultats de Kocher et appliquant des moyens de calculs actuels, nous avons déterminé pour différents systèmes automatiques des vitesses de remontage au Cyclotest. Notre approche heuristique a permis de formuler la vitesse de remontage par une expression simple; elle voit disparaître les diverses propriétés des systèmes automatiques pour ne prendre en compte que l'angle de freinage de la masse. En utilisant cette formule et connaissant les principes généraux d'un remontoir automatique, nous avons déterminé les conditions dans lesquelles une masse donnée est la plus efficace et posé des principes de construction qui permettent de dimensionner idéalement une masse oscillante sur la seule base de la puissance à la roue des secondes. Nous avons ensuite confirmé les résultats de notre théorie semi-empirique de vitesse de remontage au Cyclotest par des résultats pratiques.

Optical force sensing element and microsurgical instrument

A. Bertholds; P. Llosas; S. Henein

2013.

Patent number(s) :
ES2556810
EP2626680
EP2626680
US2013204142

Méthode de libération d'une pièce micromécanique et pièce micromécanique comprenant des attaches sacrificielles

F. Barrot; R. Fournier; L. Giriens; S. Henein; S. Jeanneret et al.

2013.

Patent number(s) :
US9770771
EP2794463
US2014363217
EP2794463
WO2013093108

Robotic system for spinal and other surgeries

S. Kostrzewski; P. Berard; C. Baur; J. Duff; K. Sandu

2012.

Patent number(s) :
US2018008353
US9833292
US9308050
US2016038238
US9125680
US2015045813
US2014121676
WO2012131660

The present invention relates to a method, such as a surgical method for assisting a surgeon for placing screws in the spine using a robot attached to a passive structure. The present invention also related to a method, such as a surgical method for assisting a surgeon for removing volumes in the body of a patient using a robot attached to a passive structure and to a device to carry out said methods. The present invention further concerns a device suitable to carry out the methods according to the present invention.

Short Communication: Flexure delicacies

S. Henein

Mechanical Sciences. 2012.

DOI : 10.5194/ms-3-1-2012.

Flexures are nowadays enjoying a new boom in numerous high-precision and extreme-environment applications. The paper presents some delicate issues concerning stiffness compensation, large reduction ratios, as well as rectilinear and circular movements in compliant mechanisms. Novel concrete technical solutions to these well-known issues are described, giving a glimpse into the vast and still largely unexploited potential of flexure mechanisms manufactured by wire-electrical-discharge machining.

Immobilizing device for a toothed wheel

F. Colpo; S. Henein

2011.

Patent number(s) :
US20130070570

Conception des guidages flexibles

S. Henein

Lausanne: Presses Polytechniques et Universitaires Romande.

Flexures: simply subtle

S. Henein

Diamond Light Source Proceedings. 2011.

DOI : 10.1017/S204482011000002X.

Flexures are enjoying a new boom in numerous high-precision and extreme-environment applications. This paper presents some general aspects of flexure design, showing simple principles, and also some subtler issues concerning kinematic design, stiffness compensation, large reduction ratios and rectilinear as well as circular movements

Flexure-based pointing mechanism with sub-microradian resolution for the Laser Interferometer Space Antenna

S. Henein; P. Spanoudakis; P. Schwab; I. Kjelberg; L. Giriens et al.

2010. EUSPEN 2010 , Delft, the Netherlands , May 31-June 4, 2010. p. 84.

The Point Ahead Angle Mechanism (PAAM) for ESA’s Laser Interferometer Space Antenna (LISA) mission will compensate the out-of-plane point-ahead angle between three satellites flying 5 million kilometres apart. The PAAM consists of a mirror supported by flexures allowing the mirror to rotate with a maximum stroke of ± 412 rad. The mirror is actuated in 0.14 μrad steps by two redundant linear Piezo LEGS® actuators driving a sine-bar. Since the actuators are self-locking, a special lever performing the role of a linear mechanical differential is used to provide redundancy. The angle is driven in closed loop using two capacitive sensors.

Correcteur d'isochromisme pour échappement horloger et échappement muni d'un tel correcteur

S. Henein; P. Schwab

2009.

Patent number(s) :
EP2290471

Design and development of the point-ahead angle mechanism for the lase interferometer space antenna (LISA),

S. Henein; P. Spanoudakis; P. Schwab; Y. Kjelberg; L. Giriens et al.

2009. 13th European Space Mechanisms & Tribology Symposium , Vienna, Austria .

The Point Ahead Angle Mechanism (PAAM) for ESA’s Laser Interferometer Space Antenna (LISA) mission will compensate the out-of-plane point-ahead angle between three satellites flying 5 million kilometres apart. The PAAM consists of a mirror supported by flexures allowing the mirror to rotate with a maximum stroke of ±1 mrad. The mirror is actuated in 0.14 μrad steps by two redundant linear Piezo LEGS® actuators driving a sine-bar. Since the actuators are self-locking, a special lever performing the role of a linear mechanical differential is used to provide redundancy. The design uses high-precision flexures to minimise mirror parasitic piston displacements in the picometres range. The angle is driven in closed loop using two capacitive sensors. This paper presents the mechanism at the design stage of an elegant breadboard (EBB) ready for tests. The performance requirements are summarized, then the overall concept of the mechanism is described, at last the key aspects of the detailed design are discussed: flexures design, kinematic structure, kinematic mount, redundant piezo-actuation, sensors and control. Optimisation of the design has shown that the selected high-precision design can meet the stringent requirements of fine positioning and severe environments.

Device for converting a first motion into a second motion responsive to said first motion under a demagnification scale

S. Henein

2006.

Patent number(s) :
US2010313691
WO2008046539
EP1914194

Surgical navigation system

M. Felber; I. Pappas; M. Caversaccio; C. Baur

2005.

Patent number(s) :
WO2005067807

The invention relates to a surgical navigation system, comprising a microscope to which a 3D measuring apparatus is rigidly fixed, for localising objects within the field of operation. Markers are fixed to the objects the position of which is desirable to know, for example, the patient or surgical instruments, which are themselves connected to the measuring system. The change in coordinates between the measuring system and the microscope is fixed as the two devices are rigidly connected. Also, knowing the position of the markers relating to the measuring system, it is possible to calculate the change in coordinates between the markers and the image from the microscope. When the markers are recorded, in other words when the relationship between the real objects and the virtual objects is determined, the information can then be used as a navigational instrument and/or for enhanced reality. A typical application for enhanced reality is the superimposition of a 3D anatomical model of the patient on the microscope image, generated from a pre-operative scan of the patient.

I M P R O G I N E E R I N G

Collective creation : improvised arts and engineering

 Course within EPFL’s Social and Human Sciences (SHS) program developed by Prof. Simon Henein, in cooperation with the Arsenic Theater (Centre d’art scénique contemporain) in Lausanne

Video of the public presentation made by the 24 students of the Improgineering course on 23.5.2018, ARSENIC, Rue de Genève57, Lausanne.

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Présentations publiques des étudiants du cours EPFL-ARSENIC “Création collective : arts improvisés et ingénierie”

Présentation générale: mercredi 15 mai 2019 de 19h30 à 21h15
Présentation finale: mercredi 22 mai 2019, performances de 19h30 à 21h15, table ronde avec le jury de 21h30 à 22h00

ARSENIC, Salle « LABO », Rue de Genève 57, Lausanne

Entrée libre avec réservation obligatoire en raison du nombre de places limité. 

Veuillez effectuer une réservation par place souhaitée, merci de votre compréhension.

Les réservations ouvrent le 25 avril 2019.

RESERVATION


Annonce Présentation Improgineering 15 et 22 mai 2019 (PDF)

Contact: marine.clogenson@epfl.ch

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Jury 2019

Marilyne Andersen
Professeure EPFL, Laboratoire de performance intégrée au design

Pierre Dillenbourg
Professeur EPFL, Laboratoire d’ergonomie éducative

Christophe Jaquet
Metteur en scène, The National Institute

Ivan Pittalis
Directeur adjoint de l’Arsenic

Nicole Seiler
Chorégraphe, Compagnie Nicole Seiler

Lucie Perrotta
Etudiante EPFL en Systèmes de communication, ancienne étudiante Improgineering

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The video of the related Microgineering course tough by Prof. Simon Henein to the Microengineering Bachelor students reveals the underlying links between the creative processes of improvised arts and those of engineering design.

A bridge to the humanities

In 2017, Professor Henein conceived a new course linking the engineering and humanities faculties of the EPFL. “Collective creation : improvised arts and engineering.” The year-long course, which was launched in September 2017, is part of EPFL’s Social and Human Sciences (SHS) program. It was developed in cooperation with the Arsenic Theater (Centre d’art scénique contemporain) in Lausanne.

The course examines the creative process in engineering design and improvisation within the performing arts. Experts in a wide range of disciplines, ranging from theater to mathematics, present the students with creativity as expressed in their field of expertise. Workshops explore improvisation through theater, music, dance and the performance arts. The 24 students will stage their final project with a dress rehearsal on May 16 2018 and give their final presentation before their examiners on May 23. Both events will be open to the public.

Professor Henein emphasizes collaborative work : “Collectively, our creative potential is huge – much greater than that of each one of us individually – but to fully tap into it, we have to be able to create together. That’s why this class delves so deeply into this skill, which will be crucial in the students’ future careers. We look at intuition, expression, listening, trust and self-reflection. The students are exposed to a wide range of approaches to the creative process, from the hard sciences to engineering and stage performance. All these influences will play a part in their professional work.”

This course is open to all first-year Master’s students at EPFL and classes run in three-period blocks every week throughout the school year. The course will be given again in September 2018.

Un pont vers les humanités

Le nouveau cours « Création collective : arts-improvisés et ingénierie » intégré au programme Sciences Humaines et Sociales (SHS) de l’EPFL, a été élaboré par Prof. Simon Henein, en collaboration avec le Centre d’art scénique contemporain de Lausanne (Arsenic). L’enseignement initie les étudiants aux techniques d’improvisation développées dans les arts vivants (théâtre, musique, danse, performance) et interroge leur possible transposition aux pratiques de conception de l’ingénierie. Les processus créatifs collectifs étudiés sont mis en œuvre au travers d’un projet qui aboutit à une présentation publique sur la scène de l’Arsenic. Les performances improvisées par les étudiants intègrent leurs réalisations techniques, révélant ainsi les polarités et articulations entre leur présence physique et celle de leurs artefacts.

Communiqué de presse commun EPFL-ARSENIC du 8.5.2018

extrait actes

Impro

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Jury 2018

Isabelle Bouhet
comédienne et metteure en scène

Danielle Chaperon
professeure à la faculté des lettres de l’Université
de Lausanne et directrice du Centre d’études théâtrales

Gisou van der Goot
doyenne de la faculté des sciences de la vie à l’EPFL

Laure Kloetzer
professeure assistante en psychologie socioculturelle à l’Université de Neuchâtel

Susanne Martin
Ph.D. des Universités de Northampton et Middlesex, danseuse, chorégraphe et artiste de performance

Patrick de Rham
directeur de l’Arsenic

Nicolas Weibel
directeur de Greene, Tweed & Co. (Suisse) SA
(conception et fabrication de pièces haute-performance en composites)
Ph.D. de l’EPFL en science et génie des matériaux

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Extrait des Actes de cours
Création collective : arts improvisés et ingénierie. Actes du cours 2017-2018
Livret de 56 pages édité par Simon Henein & Joëlle Valterio (Fichier PDF ici)
Graphisme Atelier 4b, Sandra Meyer, Impression Artgraphics Cavin ​​ SA​​​​, Mai 2018
Extrait actes

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Presse
Article paru dans l’EPFL-Magazine n°17, mai 2018
Article paru dans le magazine de l'EPFL
Article paru dans l’EPFL-Magazine n°10, septembre 2017
Article paru dans le magazine de l'EPFL

Références

Bibliographie – une sélection

Le spectateur émancipé / Jacques Rancière
Dictionnaire culturel des sciences / dir. Nicolas Witkowski
Dictionnaire de la performance et du théâtre contemporain / Patrice Pavis
La science n’est pas l’art / Jean-Marc Lévy-Leblond
Pratiques de l’improvisation / Serge Margel
L’acteur invisible / Yoshi Oida
L’espace vide / Peter Brooke
Condition de l’homme moderne / Hannah Arendt
La Poétique / Aristote
Le Théâtre des philosophes / Jacques Taminiaux
Le Pouvoir des commencements / Myriam Revault d’Allonnes
Performance, Expérimentation et théorie du théâtre aux USA / Richard Schechner
Rapport sur la construction des situations / Guy Debord
Le Rire, essai sur le signification du comique / Henri Bergson
L’Art comme expérience / John Dewey
Improvising machines: Ethnographically informed design for improvised electro-acoustic music / John Bowers
The Ecological Approach to Visual Perception / James Gibson
Studies in ethnomethodology / Harold Garfinkel
Ways of the Hand: The Organization of Improvised Conduct / David Sudnow
Lectures on Conversation / Harvey Sacks
Plans and situated actions: The problem of human–machine communication / Lucy Suchman
Human–Machine Reconfigurations / Lucy Suchman
L’improvisation: sa nature et sa pratique dans la musique / Bailey Derek

Artistes et oeuvres cités – une sélection

Jeux d’enfants / Bruegel
L’âne à l’école / Bruegel
Théorème de Pythagore
Le robot Delta / Reymond Clavel
Les machines de l’île de Nantes / François Delarozière et Pierre Orefice
La Saga des géants / Royal de Luxe
Johann Le Guillerm
Louise Bourgeois
Angelica Liddell
Wajdi Mouawad
Castellucci
Yan Duyvendak
Pippo Delbono
Allan Kaprow
Massimo Furlan
Il Ritorno d’Ulisse in Patria (L’Umana Fragilità) / Monteverdi

Supports de cours

Diapositives des blocs théoriques

–  Introduction ; Pr Simon Henein

– Dramaturgie de l’improvisation: état des lieux ; Pr Danielle Chaperon

– Sociologie de l’improvisation collective : théorie et analyse ; Pr Alain Bovet

Création collective: arts-impro et ingénieriePr Simon Henein

Brève histoire de la créativité en sciences ; Dr Ilan Vardi​​​​​​​

Planning

Planning du semestre d’automne  (version du 20 septembre 2017)

Plateforme Moodle (accès réservé aux étudiants): planning détaillé, échanges de documents et autres supports de cours

Intervenants

Enseignants des ateliers

Théâtre: Isabelle Bouhet
Musique: Jacques Bouduban
Danse: Simon Henein
Performance: Joëlle Valterio

Enseignants des blocs théoriques

Dramaturgie de l’improvisation: état des lieux: Pr Danielle Chaperon
Sociologie de l’improvisation collective : théorie et analyse: Pr Alain Bovet
Création collective: arts improvisés et ingénierie: Pr Simon Henein
La créativité dans les sciences: Dr Ilan Vardi

Artistes progammés à l’Arsenic et intervenant dans le cadre du cours​​​​​​​ 

Audrey Cavelius
Nicole Seiler
Claire Dessimoz
Immanuel de Souza
Tiphanie Bovay-Klameth
Christophe Jaquet
Maud Blandel

Bruegel Enfants 1560

A propos de ce blog

Ce blog documente la réalisation du nouveau cours SHS Master EPFL 2017/2018 « Création collective: arts improvisés et ingénierie » initié par le Pr Simon Henein, en collaboration avec l’Arsenic. Le blog est géré par Joëlle Valterio, assistante de construction.

Responsable du cours: Pr Simon Henein
Assistante de construction: Joëlle Valterio

flyer cours recto

article epfl magazine

Blog du cours « Création collective: arts improvisés et ingénierie »

Trop beau pour être faux

13 décembre 2017 – La créativité dans les sciences par Ilan Vardi

Poser la question de la créativité dans les sciences, c’est faire l’hypothèse que la créativité existe. Or scientifiquement, rien ne prouve que la créativité existe. Donc, comment enseigner quelque-chose qui n’existe pas? Dans un essai rhyzomique, Ilan Vardi nous dévoile que mathématiquement, la vie est impossible à vérifier et arrive à la conclusion non-scientifique que la créativité ne peut être enseignée. (jv)

« This result is too beautiful to be false. It is more important to have beauty in one’s equation than to have them fit experiment. » (Paul Dirac, Scientific American, 1963).

slide vardi

La performance a lieu de l’autre côté du miroir

6 décembre 2017 – Atelier Performance 2 par Joëlle Valterio

La performance est réelle, mais intouchable, elle n’existe que si un public est présent pour se refléter, elle accueille tout ce qu’on lui donne. La simple consigne “faites quelque chose” suffit à l’activer pour qui sait la voir. (sh)

atelier performance

atelier performance

Improviser c’est jouer avec le feu

29 novembre 2017 – Atelier Performance 1 par Joëlle Valterio

Les objets, on les porte, on les tient ou c’est eux qui nous tiennent. Concrets, encore plus que les mots, ils peuvent à tout moment avaler ce que nous créons, mais si on sait les intégrer à nous-mêmes, ils deviennent autant d’organes d’expression extraordinaires. (sh)

>> Vidéo

atelier performance

atelier performance

La page blanche de l’ingénieur

1 décembre 2017 – Interview de Simon Henein

Dans le cadre du Festival des Urbaines à l’Arsenic début décembre 2017, Alexandre Jewell de CultuRadio interroge Simon Henein au sujet du cours SHS de l’EPFL « Création collective: arts improvisés et ingénierie »:

>> Ecouter l’interview

L'Âne à l'école / Bruegel (1556)

Entre improvisation artistique et conception technique

22 novembre 2017 – Conférence de Simon Henein

Conférence « La création collective : entre improvisation artistique et conception technique » dans le cadre du cycle de conférences publiques « Créativités » (« La recherche dans tous ses états »)

Simon Henein: « Dans cette conférence, j’expose un point de vue personnel issu de mon expérience de terrain des créations collectives en ingénierie (en particulier la conception micromécanique) et dans les arts vivants improvisés (en particulier les performances de danse et musique en composition instantanée). Les deux types de processus de création en jeu semblent en apparence être aux antipodes et leur mise en contraste me paraît éclairer la question de la créativité en général. Cet exposé relate également les premières observations issues du nouveau cours « Création collective: arts-impro & ingénierie » que j’enseigne à l’Arsenic aux étudiants de l’EPFL. »

La complémentarité des choses

15 novembre 2017 – Atelier Musique 2 par Jacques Bouduban

Par des exercices ciblés, Jacques Bouduban invite les étudiants à être à l’écoute de tout. Il s’agit  d’apprendre à impliquer le public, à utiliser l’espace à disposition et à construire des images. Banc de poissons, essaim d’abeilles, gazon anglais, grains de sables, gouttes de pluie – on découvre ensemble la puissance des moments où une action collective émerge et se développe. Et on apprend aussi le silence, car « pour que ça commence, il faut un moment où il n’y a rien. » A l’issue de ce deuxième atelier, tous s’impliquent dans une grande improvisation, d’abord cadrée, puis libre. Les étudiants ont apporté leurs instruments: luth, guitare, flute, percussion, clavier électronique, boîte à rythmes. Un micro, un violoncelle, un déguisement et des cordes sont également à disposition. (jv)

>> Vidéo

musique_3

musique_4

Perdre le soi

8 novembre 2017 – Atelier Musique 1 par Jacques Bouduban

Se saluer, moduler l’alphabet, chanter son propre nom, prendre la parole, donner l’espace, créer un accord et un décor: les séquences s’enchaînent et sont analysées avec humour et bienveillance. « J’ai vu que tu doutais en tant que porte » dit Jacques Bouduban avec un sourire, à une étudiante chargée de « faire le décor ». Il ajoute: « Pendant que tu fais, il ne faut pas avoir de réflexion sur ce que tu fais. » En effet, la réflexion vient après: « Qu’est-ce qu’on a vu? Qu’est-ce qui s’est passé? Comment améliorer? » demande-t-il. Pour Jacques, « improviser, c’est être ouvert à la complémentarité des choses afin de pouvoir toujours dire oui à ce qui se passe. »
« Il faut du courage pour improviser » admet-il à la fin de ce premier atelier. Immanuel de Souza, musicien en production à l’Arsenic, qui a assisté au cours renchérit: « Oui, il faut se perdre dans le faire – perdre le soi pour être (dans) l’action. » (jv)

>> Vidéo

musique_1

musique_2

Potentialités émergentes

1 novembre 2017 – Sociologie de l’improvisation collective par Alain Bovet

Alain Bovet propose de restaurer une certaine continuité entre vie, science et art. Sa définition positive de l’art improvisé comme « production artistique qui maximise la découverte et l’utilisation de potentialités émergentes » est basée sur les concepts d’indexicalité, de contingence et d’affordance. En utilisant les outils de l’ethnométhodologie, il propose d’analyser comment on « crée du sens » en révélant l’ordre qui émerge dans la performance d’une situation particulière (une conversation, une performance de danse improvisée, etc.). (jv)

>> Videos
>> Supports de cours

transcript_Bovet

Où et quand ?

25 octobre 2017 – Atelier Danse 2 par Simon Henein

Forts des expériences des ateliers précédents, nous avons plongé dans des premiers exercices de composition instantanée, où il s’agit de décider « où » et « quand ». En effet, trouver le rythme par/dans le corps, c’est répondre à la question « quand? ». Et trouver le lieu dans l’espace, c’est répondre à la question « où? ». Le temps et l’espace en trois heures d’atelier, « c’est un peu la mer à boire », avoue Simon Henein en filant la métaphore maritime lancée lors du premier atelier. Néanmoins, les étudiants ont désormais le goût du voyage. (jv)

>> Vidéo

Danse / Heneine

Danse / Henein

Mener en bateau… droit au but

18 octobre 2017 – Atelier Danse 1 par Simon Henein

« Je vous ai mené en bateau… mais droit au but! » avoue en riant Simon Henein à la fin de ce premier atelier de danse. En effet, par de subtils exercices, il nous a amené pas à pas à découvrir une danse qui se fait presque malgré nous lorsque la confiance grandit et que l’écoute et l’interprétation se font physiques. Guider et suivre se confondent lorsque l’attention se porte sur ce qui émerge dans l’entre-deux: la danse.
Plus tard, Diane Stierli, notre vidéaste attitrée et championne de régate m’expliquera qu’en course, l’objectif est clair: atteindre la bouée… mais qu’il faut apprendre à improviser avec le vent! (jv)

>> Video

Danse / Henein

Danse / Henein

Extension du domaine de la fragilité

11 octobre 2017 – Dramaturgie de l’improvisation par Danielle Chaperon

Le théâtre serait-il né de la nécessité-même de représenter notre fragilité? Comment la forme artistique que nous avons eu besoin de donner à cette fragilité a-t-elle évolué? Comment cette forme a-t-elle eu besoin d’évoluer pour rester vivante? L’improvisation sur scène en est-elle une des formes contemporaines? L’improvisation est-elle une façon de réintroduire de la vie dans l’art? Qu’est-ce que l’improvisation sur scène nous permet d’apprendre? L’improvisation est-elle un renoncement à la solidité de l’oeuvre? Comment amener le spectateur à faire l’expérience cathartique de cette fragilité? Danielle Chaperon, professeure de littérature française à l’Université de Lausanne et spécialiste des relations entre les sciences et la littérature, examine avec nous l’évolution et l’extension du domaine de la fragilité au théâtre. (jv)

>> Video
>> Supports de cours

Dramaturgie de l'improvisation / Chaperon

Dramaturgie de l'improvisation / Chaperon

Faire corps

4 octobre 2017 – Atelier théâtre 2 par Isabelle Bouhet

Raconter, écouter, passer, tomber, traduire, regarder, exposer, imaginer, faire entendre, sentir, concevoir, troubler, identifier, reculer, terminer: Isabelle Bouhet nous invite à faire corps avec tout ce que nous faisons. Des exercices ludiques interrogent notre place et notre responsabilité dans le collectif. (jv)

>> Video

atelier theatre 2

atelier theatre 2

Tout fait jeu

27 septembre 2017 – Atelier théâtre 1 par Isabelle Bouhet

Dans ce premier atelier pratique, la comédienne Isabelle Bouhet, nous invite par des exercices ciblés à être en présence et en conscience à tout instant et développer notre faculté de faire jeu de tout. (jv)

>> Video

atelier theatre 1

atelier theatre 2

L’imagination en action

20 septembre 2017 – Introduction par Simon Henein

Arpenteur invétéré de la sphère créative, à la fois Professeur en microtechnique à l’EPFL et directeur artistique de la Compagnie L’Âme-de-Fonds, Simon Henein accueille les 24 étudiants du nouveau cours SHS qu’il a conçu. Alors qu’en principe, un ingénieur imagine d’abord, puis réalise ensuite, il convie ses étudiants à ramener l’imagination au sein-même de l’action en apprenant à improviser! (jv)

>> Video
>> Supports de cours

presentation Simon Henein

presentation Simon Henein

Imprécision et porosité

20 septembre 2017 – Accueil par Patrick de Rham

Patrick de Rham, nouveau directeur de l’Arsenic – Centre d’arts scéniques contemporains nous accueille entre les murs de son théâtre, un lieu de création singulier qui défend résolument une « vision imprécise de ce qu’est un spectacle ». Il salue la démarche originale du nouveau cours SHS de l’EPFL et la porosité entre des institutions aux méthodes à priori très différentes, mais qu’unit une démarche novatrice, ancrée dans une réalité contemporaine complexe. L’Arsenic nous accueille tous les mercredis, met à disposition ses espaces et établit le contact avec les artistes en résidence. De plus, les étudiants sont invités aux spectacles qui ont lieu après les cours. Et enfin, les performances finales des étudiants seront présentées le 23 mai 2018 à l’Arsenic. (jv)

logo arsenic

Education

The laboratory is strongly involved in the teaching of design to students of all levels. It focuses on training the creative processes from which the act of design originates and its complementarity with the analytical mind necessary to model, simulate and predict the behaviour of engineering systems.

Mechanism Design I & II / Conception de mécansimes I & II

Summary: This two semester course develops the creative capabilities of the students in the field of mechanisms design in microengineering. The course focuses as well on the the knowledge (components, physical principles, dimensioning) as on the cognitive processes from which the act of design originates.

Lecturer: Prof. S. Henein
Section: Microtechnique
Level: Bachelor semesters 2 and 3
Hours per week: 3

Présentations finales des étudiants du cours EPFL “Conception de mécanismes”, 23.5.2018, avec 140 étudiants de la section microtechnique, 2e année de Bachelor.

Collective creation: improv-arts and engineering I & II / Création collective: arts improvisés et ingénierie I & II

Summary: In September 2017, the  College of humanities of EPFL launched a new course in collaboration with the Centre d’art scénique contemporain de Lausanne (Arsenic). It comes within the Social and Human Sciences teachings at Master level. This course contrasts improvisation in the performing arts (theatre, music, dance, performance) with engineering design. Collective creative processes will be studied and put into practice through student projects culminating with an improvised public performance. Students will design technical artefacts to enhance their performance and will be evaluated based on the interplay of their artistic and technical creations.

Lecturer: Prof. S. Henein
Section: all EPFL sections
Level: Master semesters 1 and 2
Hours per week: 3
Blog of the course

Présentations publiques des étudiants du cours EPFL-ARSENIC “Création collective : arts improvisés et ingénierie”, 23.5.2018, ARSENIC, Salle “Studio“, Rue de Genève57, Lausanne. Performances de 19h30 à 21h15, table ronde avec le jury de 21h30 à 22h00, avec 24 étudiants EPFL en première année de Master venant de diverses sections.

Elements of mechanical design I & II / Construction mécanique I & II

Lecturers: Course taught by external lecturers, supervised by Prof. S. Henein & Prof. J. Schiffmann
Sections: Microtechnique / Génie mécanique
Level: Bachelor semesters 1 and 2
Hours per week: 3

Industrial and applied robotics / Robotique industrielle et appliquée

Contributing lecturers: Prof. S. Henein and Dr. Ch. Baur
Section: Microtechnique​​​​​​
Level: Master semestre 2
Hours per year: 6
Topics: 
– Flexure mechanisms
– Design of mechanisms for vacuum application
– Medical robotics

Open Master Projects

The open master projects are posted on the home page of the lab under « Student Projects« 

Open Ph.D. positions

The open Ph.D. position are poster on the home page of the lab under « Open Positions« 

Research activities

Annual Reports

2017 2016
Annual-Report_IL_2014
2015 2014
Annual-Report_IL_2013
2013

Academic Freedom of the Chair

(Text available in French only)

Liberté académique

La chaire jouit sans restriction de la liberté académique.

« La liberté académique est un héritage intellectuel des anciennes écoles et pensées philosophiques qui ont donné lieu à la fondation des universités […]. Elle a prouvé être au cours des siècles, une condition essentielle pour les fonctions primaires des universités et des institutions éducatives en général, comme la recherche et l’enseignement […]. Cette liberté rend possible l’esprit critique propre aux institutions universitaires à travers leur histoire. Ces institutions ont absolument besoin d’une liberté de façon à pouvoir accomplir leur mission sociale. » [1]

Liberté de dissémination

Les résultats de la chaire sont la propriété de l’EPFL. La chaire a la liberté de les publier dans des revues scientifiques.

« Un aspect important de la liberté académique est, comme le signalait Einstein, la dissémination des connaissances:

« Par liberté académique, j’entends le droit de rechercher la vérité et de publier et enseigner ce que l’on tient pour vrai. Ce droit implique également un devoir : on ne doit dissimuler aucune partie de ce que l’on a reconnu comme vrai. Il est évident que toute restriction de la liberté académique sert à restreinte la dissémination du savoir, ce qui entrave le jugement rationnel et l’action. » [2]

En effet, la diffusion des connaissances est une exigence des fonctions professorales. Lorsque cette diffusion se voit restreinte, cela a des répercussions négatives sur la vie scientifique, ce qui justifie la pertinence de la défense de cette liberté. » [1]

Liberté de collaboration

La chaire a la liberté de collaborer avec d’autres institutions ou des sociétés industrielles. Dans ce cas, des contrats de recherches sont mis en place par l’Office de Transfert de Technologies de l’EPFL avec ces partenaires. Ces contrats définissent, selon les principes établis par l’EPFL, les modalités de transfert de la propriété intellectuelle issue spécifiquement de ces mandats, le droit de publication, ainsi que les éventuelles obligations de confidentialité qui s’appliquent aux informations appartenant aux sociétés industrielles.

La société Patek Philippe SA qui a fait un dont pour soutenir la création de cette chaire a la possibilité d’établir de tels contrats de recherche avec cette dernière, au même titre et aux mêmes conditions que toute autre société industrielle.
La société Patek Philippe SA, n’a de droit de regard, ni sur les contrats établis par la chaire avec des tiers, ni sur les résultats de ces recherches.

Références

[1] Rangel, H. (2007). Le principe de liberté académique dans l’ère du conservatisme et de la globalisation », McGill Journal of Education, vol.42 , n°1.

[2] Rendel, M. (1988). Human rights and academic freedom. Tight, M. (Ed.) Adacemic freedom and responsibility. Guilford, England : Open University Press. (traduction française de la citation par S. Henein)

IsoSpring : continuous mechanical time

IsoSpring : film réalisé pour l’exposition Jules Grossmann au Locle par Gasser Media, Mai 2018

Mechanical timekeeping began in the Middle Ages with the invention of the escapement. After the introduction of oscillators in the 17th century, mechanical clocks and watches continued to rely on escapements. Despite numerous technical advances, today’s escapements suffer from reduced mechanical efficiency. The IsoSpring project exploits ideas dating back to Isaac Newton to create a new time base which can be driven continuously, without the stop-and-go “ticking” of traditional mechanical clocks and watches. This solves the escapement problem by completely eliminating it : the mechanical watch can work without an escapement !

The result is a simplified mechanism having greatly increased efficiency and chronometric accuracy. This project is based on a new family of oscillators and maintaining mechanisms patented by Instant-Lab.

In 2013 a successful proof of concept was achieved, leading to an industrial project in 2014. In 2016, variations of the original concept were realized as fully functional clocks. As an homage to the horological tradition of the region, the shape of the clocks is based on the famous Neuchâteloise clock design. Since December 2016, the City of Neuchâtel has exhibited the first prototype in its renovated City Hall.

Current research is focused on miniaturizing to the watch scale.

The IsoSpring’s leaflet is available here.

                                                                           Prototype “Neuchâteloise” clocks with translational oscillator

                                                                         Prototype “Neuchâteloise” clocks with rotational oscillator

                                                                                                                  Towards watch scale IsoSpring

                                              IsoSpring team at the Neuchâtel City Hall inauguration

New escapement concept

Virtual impulse escapement demonstrator.Instant-Lab introduced virtual impulse escapements in which a double beat escapement becomes a dead beat escapement when the balance wheel is at its operating amplitude. In this way, the advantages of dead beat escapements : direct impulse, greater freedom in choosing impulse position, are preserved, while the disadvantages: sensitivity to shock and difficult self-start, are minimized.

Virtual impulse escapement demonstrator.

I. Vardi; R. A. Bitterli; L. Convert; E. Thalmann; S. Henein

Bulletin de la Société Suisse de Chronométrie. 2018.

High quality factor oscillators for wrist watches

Current mechanical wrist watches have an oscillator consisting of a balance wheel mounted on jewelled bearings and a hairspring. The use of flexure bearings instead of traditional pivots leads to a significant increase in quality factor, i.e., reduced energy loss. As a result, power reserve can be significantly increased and chronometric precision can be improved thanks to reduced oscillator perturbation. However these new oscillators are sensitive to gravity and have isochronism defects. This project explores novel flexure-based pivots minimizing these issues.
Gravity insensitive flexure pivot (GIFP) demonstrators

Programmable multistable energy storage mechanisms

T-shapeThis project introduces the concept of programmable multistable mechanism in which the number and position of stable states of a multistable mechanism can be modified. A complete qualitative analysis of a generic multistable mechanism, the T-shaped mechanism, was established using analytical tools based on Euler-Bernoulli beam theory. These results were validated numerically using finite element analysis and experimentally using physical models. Applications include new surgical tools and programmable metamaterials.

T-shaped multistable mechanism programable to have 1 to 4 stable positions

Stable and unstable states of the T-shaped mechanism

CTI Miniature flexure structures for multi-degree of freedom contact force sensing (VIVOFORCE)

The project developed active surgical tools fitting microsurgery requirements, e.g., eye and brain surgery. Combining flexible structure technology provided by Instant-Lab together with Sensoptic SA’s in-house optical fiber based sensing technology which has been successfully used in heart, ear, nose and throat surgery. Providing surgical instruments that are force sensitive at the tool tip allows precise and reliable
surgical gestures far exceeding current practice. Watchmaking applications are also foreseen.

This project was funded by Sensoptic SA and the Commission for Technology and Innovation CTI (Switzerland) and run in collaboration with Pr. Th. Wolfensberger, Hôpital Ophtalmique Jules-Gonin, Lausanne. The project was completed within budget in November 2016 successfully satisfying the goals set by all partners.

Retinal surgery with force sensitive peeling hook 02

Retinal surgery with force sensitive peeling hook

CTI Safe Puncture Optimized Tool (SPOT) for retinal vein cannulation

Retinal Vein Occlusion is a vascular disorder causing severe loss of vision. Retinal vein cannulation and injection of therapeutic agents in the affected vein is a promising treatment but the small size and fragility of retinal veins as well as the surgeon limited hand gesture precision and force perception makes this procedure too delicate for routine operations. The project aims at providing a compliant mechanical tool relying on a new programmable multistable mechanism to safely cannulate veins. This mechanism has the advantage that puncturing stroke and force can be predetermined so that puncturing is independent of surgeon manipulation. The feasibility of this project was demonstrated by a prototype made by femto-laser printing, one of the first buckled mechanisms manufactured in glass.

This project is funded by FemtoPrint SA and the Commission for Technology and Innovation CTI (Switzerland) and run in collaboration with Pr. Th. Wolfensberger, Hôpital Ophtalmique Jules-Gonin, Lausanne.

          Glass needle for retinal vein puncturing          Glass needle for retinal vein puncturing bistable mechanism

Glass needle for retinal vein puncturing (left) and its bistable mechanism (right)

SNSF Adjustable midsole intervention footwear for patients with medial compartment knee osteoarthritis (ADVANCER)

Geometrically adjustable shoe orthotic.This project consists of a geometrically adjustable shoe orthotic to balance knee and hip loads which could otherwise lead to cartilage wear and tear, thus avoiding surgical intervention. Our proposed solutions are based on flexible elements combined with metamaterial. This Swiss National Science Foundation project is a collaboration with CHUV (Centre Hospitalier Universitaire Vaudois). Different prototypes were realized and successfully tested at CHUV. We are currently examining if the proposed device can be developed into a commercial product. One patent is pending.

Geometrically adjustable shoe orthotic.

STI Enable SOLE Project

The object of the SOLE project is to produce ADVANCER prototypes and to test them on CHUV patients. The project is funded by the EPFL STI (School of Engineering) Enable Initiative.

Adjustable midsole intervention footwear (orthotic) for patients with medial compartment knee osteoarthritis

                                Adjustable midsole intervention footwear (orthotic) for patients
                                              with medial compartment knee osteoarthritis

Spinal screw placement tool

Flexure based level indicating tilt angle for pedicle screw placement

This Instant-Lab project develops low cost passive alignment tools for spinal pedicle screw placement. The goal is to improve the surgeon’s ability to accurately insert a pedicle screw following a predetermined trajectory. This reduces the risk of plunging which can damage soft tissue, nerves, or the spinal cord.

Flexure based level indicating tilt angle for pedicle screw placement

SPIRITS : Interactive intelligent robotics and 3d printing for surgery and interventional radiology

The SPIRITS (Simple Printed Interactive Robotics for Interventional Therapy and Surgery) project involves developing a robotic device for image-guided surgery and interventional radiology with a number of innovations, such as a tactile transducer, an intelligent needle, new 3d printing methods and new actuators and robots. This Interreg project is a collaboration between leading institutions: INSA Strasbourg, Hochschule Furtwangen, University Hospital Mannheim, Fachhochschule Nordwestschweiz, EPFL.

Spirits team

SPIRITS team.

News

09.2018 – Vidéo Présentation Doctorat à l’EPFL par Etienne Thalmann

06.2018 – Echappements à impulsion virtuelle

I. Vardi; R. A. Bitterli; L. Convert; E. Thalmann; S. Henein

Bulletin de la Société Suisse de Chronométrie. 2018.

12.06.2018 – Swiss Medtech Day: Slam session by Thomas Fussinger on Safe Puncture Optimized Tool for Retinal Vein Cannulation

05.2018 – IsoSpring : film réalisé pour l’exposition Jules Grossmann au Locle par Gasser Media

01.2018 : Laser Technik Journal talks about Instant-Lab

FEMTOprint SA presents Instant-Lab’s Safe Puncture Optimised Tool (SPOT) for retinal vein cannulation as an example of advanced 3D subtractive manufacturing technique :

23.12.2017 : Publication in the Monochrome Magazine, « A Technical Perspective – The Flexure Revolution, Compliant Mechanisms applied to Watchmaking »

This article was published in the Monochrome Magazine, on 23th December 2017.

11.12.2017 : 3ème colloque horloger FSRM – Instant-Lab

June 2017 : Publication of the book, « The Art of Flexure Mechanism Design »

The Art of Flexure mechanism Design

Florent Cosandier, Simon Henein, Murielle Richard and Lennart Rubbert
Edited by Simon Henein & Lennart Rubbert
Hard cover, 290 pages, 1st edition, June 2017, PPUR – EPFL Press

Flexure mechanism design is an art, and this book provides the theoretical and practical foundation for scientists and engineers to express their creativity in this field. Flexure mechanisms, also known as compliant mechanisms, rely on the elasticity of matter to provide motion to mechanism linkages. Flexure mechanisms eliminate the disadvantages of classical joints: friction, wear, lubrication and play, while permitting monolithic design. Flexure-based mechanisms have gained prominence in a wide variety of fields including robotics, surgical instrumentation, aerospace, astronomy, particle accelerators, metrology and horology. This book establishes a conceptual framework for the design of flexure-based articulated structures. Topics featured deal with the theoretical foundations for the design of translational and rotational flexures, the simple kinematic analysis of flexure-based mechanisms, and advanced kinematic approaches to the design of complex flexure-based mechanisms using modules in parallel or serial arrangements. The book also features detailed examples of long stroke flexure mechanisms used in metrology applications, and a detailed example of planar flexure mechanisms having out of plane functionality and used in surgical applications. This book aims to provide scientists and engineers with a conceptual tool, an analytic methodology and the key references for their precision engineering needs.

22.11.2017 : Conférence « La création collective : entre improvisation artistique et conception technique », Prof. Simon Henein

Conférence « La création collective : entre improvisation artistique et conception technique » présentéee par Prof. Simon Henein, dans le cadre du cycle de conférences publiques « La recherche dans tous ses états ».

Mercredi 22 novembre 2017 de 17h15 à 18h45, Université de Lausanne, Bâtiment Amphimax Salle 410

Programme des Conférences « créativités »

                                   programme_conferences

27.09.2017 : Conférence – performance « Les ressorts intimes du temps », Prof. Simon Henein

Mercredi 27 Septembre 2017 à 19h15, au Musée des beaux-arts – La Chaux-de-Fonds

La conférence-performance “Les ressorts intimes du temps” raconte en mots, en images et en musique live les chemins de découverte et de création qui ont mené les chercheurs de l’EPFL jusqu’à la réalisation de “L’Horloge Neuchâteloise du XXIème siècle” présentée dans l’exposition “La Neuchateloise” du Musée International d’Horlogerie (MIH).

Cette horloge mécanique est équipée d’un oscillateur unidirectionnel IsoSpring constitué d’une sphère suspendue par quatre tiges flexibles qui pivote sur elle-même à la manière d’un oeil dont la pupille décrirait des orbites continues: l’horloge ainsi dénuée d’échappement fonctionne sans le fameux “tic-tac” et l’aiguille des secondes avance de manière continue, tout comme les astres dans le ciel. Cette invention ouvre la porte à des améliorations considérables des performances en termes de précision chronométrique et de rendement.

Cette conférence, transposée pour des raisons pratiques d’une centaine de mètres, du MIH au Musée des beaux-arts, est l’occasion de mêler les sons de la musique à ceux du discours scientifique pour constituer une matière aux résonances inédites.

                          

15.08.2017 : Horloge IsoSpring exposée au MIH

Le Musée d’horlogerie du Locle – Château des Monts et le Musée international d’horlogerie de La Chaux-de-Fonds reconsidèrent l’histoire et le destin de « la neuchâteloise » dans une grande exposition commune. L’horloge IsoSpring, horloge neuchâteloise du XXIe siècle, est actuellement présentée au MIH jusqu’au 08/10/2017.

Communiqué de presse diffusé par le MIH

Informations concernant l’exposition « La Neuchâteloise »

19.06.2017 : 2ème colloque horloger FSRM – Instant-Lab

Par Professeur Pierre Thomann, Physicien, Explorateur du Temps.

Les colloques horlogers FSRM – Instant-Lab se focalisent alternativement sur la science de la mesure du temps, l’artisanat horloger et l’industrie horlogère. Ils rassemblent les communautés horlogère et académique autour de personnalités reconnues de chacun de ces univers. Ces colloques s’adressent également aux jeunes en formation, aux étudiants universitaires et au grand public.

                                                                           ***************

Pierre Thomann, physicien et explorateur du temps, a consacré sa vie à la mesure du temps. Avec une thèse de doctorat en optique quantique, il débute sa carrière aux USA pour revenir ensuite en Suisse où il mène ses recherches sur les horloges atomiques, chez Asulab, Oscilloquartz, à l’Observatoire de Neuchâtel et au Laboratoire Temps Fréquence de l’Université de Neuchâtel qu’il dirige entre 2007 et 2011. Pierre Thomann maîtrise l’art d’expliquer de manière simple des phénomènes d’une grande complexité.

 

 

06.06.2017: Système horloger révolutionnaire présenté dans « NZZ Bellevue »

Article sur IsoSpring dans NZZ Bellevue

NZZ – Bellevue : Das mechanische Uhren-Schwingsystem IsoSpring: Eine runde Sache

Juin 2017 : Article publié dans le bulletin de la SSC, La R&D commune entreprises-université dans l’industrie horlogère de 1900 à nos jours

Pierre-Yves Donzé, Ilan Vardi and Simon Henein; Bulletin de la Société Suisse de Chronométrie 83 (juin 2017), p. 21-28.

« La R&D commune entreprises-université dans l’industrie horlogère de 1900 à nos jours » 

23.03.2017 : 1er colloque horloger FSRM – Instant-Lab

Par François Junod, Automatier – Sculpteur

Les colloques horlogers FSRM – Instant-Lab se focalisent alternativement sur la science de la mesure du temps, l’artisanat horloger et l’industrie horlogère. Ils rassemblent les communautés horlogère et académique autour de personnalités reconnues de chacun de ces univers. Ces colloques s’adressent également aux jeunes en formation, aux étudiants universitaires et au grand public.

                                                                           ***************
François Junod, après une double formation de micromécanique et des Beaux-Arts, est aujourd’hui automatier-sculpteur. Il crée avec son équipe à Sainte-Croix des automates androïdes d’une grande complexité qui viennent trouver leur place dans le monde entier. Il nous emmènera dans le monde fascinant et magique de la mécanique intime qui anime ses personnages et dont les éléments fondateurs sont ceux de l’horlogerie mécanique: engrenages, ressorts et spiraux…

 

            

 

17.12.2016 : Vernissage de l’Horloge IsoSpring installée à l’Hôtel de Ville de Neuchâtel

Samedi 17 décembre 2016 de 9h00 à  17h00, dans le cadre de l’inauguration de l’Hôtel de Ville rénové.

Le premier prototype de l’horloge neuchâteloise du XXIe siècle imaginé et réalisé à  Neuchâtel par les chercheurs de l’EPFL (Instant-Lab) est désormais installé dans la Salle des Pas Perdus de l’Hôtel-de-Ville. Grâce au nouvel oscillateur IsoSpring, le temps redevient silencieux et continu, à  l’instar du mouvement des corps célestes, sa référence originelle.

                                Horloge_HDV

09.12.2016 : Conférence de presse: l’horloge IsoSpring, au mécanisme révolutionnaire, mise en valeur à l’Hôtel de Ville

             conference de presse Horloge IsoSpring HdV

Communiqué de presse.pdf

info IsoSpring.pdf

09.03.2016 : Public conference Prof. Simon Henein: Les ressorts intimes du temps

                           Les ressorts intimes du temps Prof. Simon Henein, EPFL

17.09.2015 : Conference by D. Bateman on the quality factor

17.09.2014 : Presentation of the novel IsoSpring oscillator

Presentation of the novel IsoSpring oscillator at the “Journée d’étude de la Société Suisse de Chronométrie”, SwissTech Convention Center, Lausanne, Sept 17, 2014.

SSC annual assembly

24.07.2014 : Annual report 2013 available

The annual report 2013 of the lab’s scientific activities can be downloaded from this web site.

Leçon inaugurale du Professeur Simon Henein, jeudi 6 février 2014, 17h15, EPFL auditoire SG1

S’il ne faisait qu’imaginer, l’ingénieur serait seulement poète, si en plus il crée des machines, il devient inventeur. Mais pour être ingénieur, il faut aussi se donner les moyens de réaliser ses objectifs, et ceci en faisant appel à des connaissances souvent empiriques et en appliquant des principes physiques ou mathématiques.» Cet extrait de la définition d’ingénieur tiré du Dictionnaire culturel des sciences (Seuil) nous replace dans la dimension synthétique et créative du métier. Dans ma leçon inaugurale, j’exposerai ma manière d’orchestrer le processus créatif individuel et collectif par des exemples de recherches en cours dans mon laboratoire. Ces dernières couvrent le domaine de la mécanique à l’échelle horlogère, assurant la continuité et le renouveau de cette discipline qui contribue historiquement au rayonnement de la Suisse. En nous appuyant sur les connaissances scientifiques actuelles et historiques, aussi bien théoriques qu’appliquées, nous développons le savoir et les méthodes de conception portant sur des mécanismes aux fonctions et performances inédites. Ces mécanismes sont destinés à devenir des machines nouvelles au service de l’humain et de son environnement: gardes-temps, outils médicaux, robots, instruments scientifiques.

         lecon_inaugurale_Henein

Hilti and Omega prizes awarded to Billy Nussbaumer

The Hilti prize in mechatronics and the Omega prize were both awarded to Billy Nussbaumer for his master project during which he developped a 7-DOF force feedback haptic interface for microsurgery.

                                                      

Article in the NZZ Equity

An article (in German) on the Instant-Lab in the NZZ equity magazine.

Public conference by Ilan Vardi

Ilan Vardi is giving a conference at FSRM (Fondation Suisse pour la Recherche en Microtechnique) on October 30th (entry is free).

                                               conference_ilan_vardi_astronomie de la montre

Head of the laboratory

Professor Simon Henein

Short biography

Born in 1973 and of Egyptian-Swiss nationality, Simon Henein grew up in Cairo. He obtained an engineering degree at the Ecole Polytechnique Fédérale de Lausanne (EPFL) in 1996 and went on to complete his doctorate at the EPFL in 2000. In 2001, he published the book « Conception des guidages flexibles » which has become a reference in precision engineering. He then joined the Centre Suisse d’Electronique et Microtechnique (CSEM), Neuchatel, Switzerland, where he conceived and developed mechanisms for robotic, aerospace, medical and watchmaking applications. He pursued his research career at the Paul Scherrer Institute, Villigen, Switzerland, where he developed instruments for the Swiss Light Source Synchrotron (SLS). Since November 1st, 2012, he is associate professor in microengineering at the EPFL, holder of the Patek Philippe Chair and director of the Micromechanical and horological design laboratory (Instant-Lab).

 

Brève biographie

Né en 1973, de nationalités suisse et égyptienne, Simon Henein effectue sa scolarité au Caire. Il obtient son diplôme d’ingénieur en microtechnique de l’Ecole Polytechnique Fédérale de Lausanne (EPFL) en 1996, puis le titre de docteur ès sciences techniques de cette même institution en 2000. En 2001 il publie un livre intitulé «Conception des guidages flexibles» qui devient une référence dans le monde de la conception micromécanique. Il s’engage ensuite professionnellement au Centre Suisse d’Electronique et Microtechnique (CSEM) où il conçoit et développe des mécanismes dédiés à des applications robotiques, spatiales, astrophysique, biomédicales et horlogères ainsi qu’à l’Institut Paul Scherrer où il développe des instruments pour le synchrotron suisse SLS. Depuis le 1er novembre 2012, il est professeur associé en microtechnique à l’EPFL,  titulaire de la Chaire Patek Philippe et directeur du Laboratoire de conception micromécanique et horlogère (Instant-Lab). 

Inaugural Lecture – Leçon inaugurale

Conférence 27.09.2017 – Les ressorts intimes du temps

Team

Head of Laboratory


    Associate Professor
    +41 21 69 54334
    +41 21 69 54254

Administrative staff


Post-docs & Research staff


PhD students


Technical staff


Other


Instant-lab

 La ronde des heures, 1922, Charles Biéler

La ronde des heures, 1922, Charles Bieler, Le Locle city hall fresco

Following the April 2011 announcement of a partnership between watchmaking manufacture Patek Philippe and the EPFL, the Patek Philippe Chair in Micromechanical and Horological Design was established on November 1st, 2012, with the nomination of Professor Simon Henein. Instant-Lab, the name chosen for the new laboratory, is located in Microcity, the EPFL Microtechnology centre in Neuchatel, Switzerland. Instant-Lab currently consists of a dozen senior scientists, postdoctoral scholars and graduate students. The laboratory’s specialty is the creation of new mechanisms featuring kinematic and technological innovation at the centimetre scale. The scientific approach is inspired from mechanical design in fields such as new and classical horology, robotics and aerospace. Current projects apply to mechanical watchmaking and biomedical instrumentation, these fields being quite close, both technologically and in their industrial fabric. Beyond the laboratory’s academic mission to pursue excellence in fundamental research and teaching, the Patek Philippe Chair is also committed to strengthen ties with the Swiss watchmaking industry and therefore welcomes collaboration with all its industrial partners.

Videos

Inaugural Lecture, Professor Simon Henein, 6.2.2014

Les ressorts intimes du temps performative conference, Pr Simon Henein, 27.9.2017

Mechanism design, videoclip of thecourse taught to Bachelor student in Microengineering

Improgineering, videoclip of the course taught to Master students from several EPFL sections

Suite à l’annonce en avril 2011 du partenariat entre la manufacture horlogère Patek Philippe et l’EPFL, la Chaire Patek Philippe en conception micromécanique et horlogère voit le jour le 1er novembre 2012, avec la nomination du Professeur Simon Henein. Le laboratoire, baptisé Instant-Lab, est situé à Microcity, au sein de l’Institut de Microtechnique de Neuchâtel. A ce jour, il réunit une dizaine de chercheurs : collaborateurs scientifiques, post-doctorants et doctorants. La spécialité du laboratoire est la création de mécanismes à l’échelle du centimètre incluant des cinématiques et des technologies nouvelles. La démarche scientifique adoptée s’inspire de nombreux domaines de conception mécanique comme l’horlogerie ancienne et moderne, la robotique ou encore les mécanismes aérospatiaux. Les domaines d’applications actuels sont l’horlogerie mécanique et l’instrumentation biomédicale. Ces deux domaines sont très proches, aussi bien sur le plan technologique, que sur le plan du tissu industriel. En plus de sa mission scientifique sur les plans fondamentaux et appliqués et de sa mission éducative, la chaire vise à renforcer et à pérenniser l’industrie horlogère suisse : elle est ouverte à collaborer avec tous ses acteurs.

Vidéos

Leçon inaugurale, Professeur Simon Henein, 6.2.2014

Les ressorts intimes du temps,  Conférence-performance présentée par Pr Simon Henein, 27.9.2017

Conception de mécanismes, vidéoclip du coursenseigné aux étudiants Bachelor en Microtechnique

Improgineering, videoclip su cours enseigné aux étudiants Master de diverses sections EPFL)