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Simon Nessim Henein

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Publications associées (103)

Rectilinear translation four-bar flexure mechanism based on four Remote Center Compliance pivots

Simon Nessim Henein, Charles Baur, Loïc Benoît Tissot-Daguette, Hubert Pierre-Marie Benoît Schneegans, Quentin Gubler

This paper presents a novel planar four-bar linkage compliant mechanism (called 4-RCC) based on four flexure-based Remote Center of Compliance (RCC) pivots. With particular configurations and dimensions, the beam shortening of the RCC pivots can compensate ...

euspen2022

A load cell with adjustable stiffness and zero offset tuning dedicated to electrical micro- and nanoprobing

Simon Nessim Henein, Charles Baur, Etienne Frédéric Gabriel Thalmann, Loïc Benoît Tissot-Daguette, Michal Stanislaw Smreczak

The tasks of electrical micro- and nanoprobing require precision that goes beyond human perception and therefore, depend on sensors providing real-time feedback. Efforts towards automation in micro- and nanoprobing and emerging areas such as branched nanow ...

2022

Analytical modeling and experimental validation of rotationally actuated pinned–pinned and fixed–pinned buckled beam bistable mechanisms

Simon Nessim Henein, Etienne Frédéric Gabriel Thalmann, Loïc Benoît Tissot-Daguette, Hubert Pierre-Marie Benoît Schneegans

Buckled beams have become key building blocks in compliant mechanisms to achieve nonlinear behaviors, such as bistability, constant-force and stiffness tuning. However, designing and modeling such components is challenging due to their highly nonlinear cha ...

2022

The Dimension of the Body in Higher Education: Matrix of Meanings in Students’ Diaries

Simon Nessim Henein, Ramiro Tau

In this paper, we attempt to show some consequences of bringing the body back into higher education, through the use of performing arts in the curricular context of scientific programs. We start by arguing that dominant traditions in higher education repro ...

2022

Triple Crossed Flexure Pivot Based on a Zero Parasitic Center Shift Kinematic Design

Simon Nessim Henein, Etienne Frédéric Gabriel Thalmann

Thanks to their absence of play, absence of contact friction and possible monolithic fabrication, flexure pivots offer advantages over traditional bearings in small-scale, high accuracy applications and environments where lubrication and wear debris are pr ...

2022

Improgineering : former à la conception collective par l’improvisation

Simon Nessim Henein, Ramiro Tau

Le projet ASCOPET étudie les arts de la scène comme outil pédagogique pour l’enseignement tertiaire. A l’EPFL, la pratique de l’improvisation, et la création d’une performance collective présentée sur la scène du théâtre l’Arsenic, permettent qinsi de trav ...

Société d'Ergonomie de Langue Française2022

Active load cell with positive, negative and zero stiffness operating modes for micronewton range contact force monitoring in electrical probing

Simon Nessim Henein, Charles Baur, Michal Stanislaw Smreczak, Hubert Pierre-Marie Benoît Schneegans

This article describes a novel method for applying a contact force in the range of 1 to 100 μN with pointed probe on a microscale sample in order to perform ohmic electrical measurements. The solution is based on the new TIVOT active load cell combining th ...

2022

Flexure pivot based system

Simon Nessim Henein, Benoît Dagon, Loïc Benoît Tissot-Daguette, Michal Stanislaw Smreczak

Flexure pivot based system (1) being one of: a force sensor, a force limiting device arranged to exert a predetermined threshold force, a torque limiting device arranged to exert a predetermined threshold torque, a programmable mechanical memory, or an acc ...

2022

La géométrie du tourbillon

Simon Nessim Henein, Roland Andreas Bitterli, Ilan Vardi, Patrick Robert Flückiger, Quentin Gubler

À l'origine, le but du tourbillon était d'améliorer la chronométrie d'une montre de poche en moyennant ses positions verticales. Avec I'avènement de la montre-bracelet, le tourbillon est prisé plus pour la prouesse technique de sa réalisation que pour sa f ...

Société Suisse de Chronométrie2021

Optical rotating torque sensor with nano newton-meter resolution based on a hanging torsion wire

Simon Nessim Henein, Billy Nussbaumer, Etienne Frédéric Gabriel Thalmann

This article presents a novel torque measuring setup working in the nano newton-meter range. The central novelty is a long (1 meter range) thin (diameter of a few tens of micrometers) metallic wire used instead of the relatively stiff torsion zone of the s ...

euspen2021

Shaking force balancing of a 2-DOF isotropic horological oscillator

Simon Nessim Henein, Etienne Frédéric Gabriel Thalmann, Hubert Pierre-Marie Benoît Schneegans

Despite centuries of research and significant advances, the escapement mechanism used to count and maintain oscillations of mechanical time bases remains a complex mechanism and a major source of energy losses. We showed in previous work that, instead of t ...

2021

Design of a Flexure Rotational Time Base with Varying Inertia

Simon Nessim Henein, Etienne Frédéric Gabriel Thalmann

Flexure oscillators are promising time bases thanks to their high quality factor and monolithic design compatible with microfabrication. In mechanical watchmaking, they could advantageously replace the traditional balance and hairspring oscillator, leading ...

2021

Rocker oscillator time bases

Simon Nessim Henein, Ilan Vardi

Since the invention of the pendulum clock by Christiaan Huygens in 1657, precision timekeepers have been regulated by oscillators. Although the pendulum is not an isochronous oscillator, its introduction as a time basis for clock regulation led to a signif ...

2021

Design of a Triple Crossed Flexure Pivot With Minimized Parasitic Shift

Simon Nessim Henein, Etienne Frédéric Gabriel Thalmann

2021

Teaching Through Performing Arts in Higher Education: Examples in Engineering and Psychology

Simon Nessim Henein, Joëlle Valterio, Susanne Martin, Ramiro Tau

This paper introduces two courses making use of performing arts at university level. The first course, taught by Prof. Simon Henein and his colleagues, called Improgineering, aims to teach collective creation through improvisation to master’s degree studen ...

2021

Optical measurement method for mechanical time base characterization

Simon Nessim Henein, Etienne Frédéric Gabriel Thalmann

The recent adoption of silicon components by the mechanical watch industry has triggered the search for new time bases to advantageously replace the traditional balance and hairspring oscillator. In particular, flexure-based oscillators manufactured in sil ...

euspen2021

Load cell with adjustable stiffness based on a preloaded T-shaped flexure pivot

Simon Nessim Henein, Charles Baur, Loïc Benoît Tissot-Daguette, Michal Stanislaw Smreczak

In this paper, we present a new flexure-based load cell with adjustable stiffness designed for force sensors with extended force range and respective measuring resolution. This novel monolithic mechanism consists of a T-shaped flexure pivot combined with a ...

euspen2021

Design and modelling of a compliant constant-force surgical tool for objective assessment of ossicular chain mobility

Simon Nessim Henein, Charles Baur, Loïc Benoît Tissot-Daguette

Surgeons generally assess the mobility of the ossicle chain by manual palpation using rigid elongated hooks inserted through the ear canal. As the applied forces are in the range of a few grams equivalent force, the measurement remains subjective and its r ...

IEEE2021

Performing arts as a tool for university education during a pandemic: Moving from an in vivo to an in vitro modality

Simon Nessim Henein, Joëlle Valterio, Ramiro Tau

This paper analyses how a course on improvisation and collective creation in engineering addressed to master's students in Switzerland moved online. The course offers an experience in the field of performing arts, through embodied and situated activities, ...

2021

Crank arrangement for driving a mechanical oscillator

Simon Nessim Henein, Billy Nussbaumer

Crank arrangement (1) for driving a pin-driven two degrees? of freedom mechanical oscillator (5), comprising:- a crank element (7) arranged to be rotationally driven about an axis of rotation (19) by means of a mechanical source of energy (M),- a crank slo ...

2020

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