Publications de Hubert Pierre-Marie Benoît Schneegans

Dynamic balancing of a flexure-based Watt's linkage horological oscillator

Simon Nessim Henein, Florent Cosandier, Hubert Pierre-Marie Benoît Schneegans

Mechanical watches are generally regulated by a balance and a spring constituting a harmonic oscillator. This mechanism is intrinsically force-balanced, which makes it essentially insensitive to gravity as well as to the linear accelerations of the watch. ...

Elsevier BV2025

Design, Characterization and Tuning of 1-DOF and 2-DOF Balanced Flexure-Based Horological Oscillators

Hubert Pierre-Marie Benoît Schneegans

Mechanisms such as those used in space applications, robotics, micro-electromechanical systems or watchmaking must meet strict environmental specifications related to thermal exchanges, electromagnetic exchanges, radiation resistance, vacuum compatibility, ...

EPFL2025

Design of a Flexure-Based Flywheel for the Storage of Angular Momentum and Kinetic Energy

Simon Nessim Henein, Florent Cosandier, Hubert Pierre-Marie Benoît Schneegans, Patrick Robert Flückiger

The flywheel is a widespread mechanical component used for the storage of kinetic energy and angular momentum. It typically consists of cylindrical inertia rotating about its axis on rolling bearings, which involves undesired friction, lubrication, and wea ...

2024

High-precision flexure-based XY-stage with high stiffness and load capacity

Simon Nessim Henein, Charles Baur, Hubert Pierre-Marie Benoît Schneegans, Patrick Robert Flückiger

Typical flexure-based XY-stages have a serial design, and their layout results in the flexures being loaded in flection in face of heavy payloads or vertical loads. This paper presents a design with zero parasitic shift in which all flexures are loaded in ...

2024

Mechanism balancing taxonomy

Simon Nessim Henein, Florent Cosandier, Hubert Pierre-Marie Benoît Schneegans

The balancing of mechanisms consists in distributing their moving masses, inertias, and elastic components in order to achieve key mechanical properties, such as the elimination of the shaking forces and moments exported onto their supporting structure or ...

2023

Mechanism Balancing Taxonomy for the Classification of Horological Oscillators

Simon Nessim Henein, Florent Cosandier, Hubert Pierre-Marie Benoît Schneegans

The balancing of mechanisms consists in distributing their moving masses, inertias, and elastic components in order to achieve key mechanical properties, such as the insensitivity of the mechanism to gravity and to the motions of its chassis, or the elimin ...

2023

Flexure-based planar xy transition table

Charles Baur, Hubert Pierre-Marie Benoît Schneegans, Patrick Robert Flückiger

Flexure mechanism (1) comprising:- an end effector (3) arranged to be able to move in a first plane (XY);- an intermediate stage (7) linked to said end effector (3) by means of at least three first beams (5) extending substantially perpendicular to said fi ...

2022

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

Detection mechanism for a medical sensing tool, medical sensing tool

Charles Baur, Loïc Benoît Tissot-Daguette, Hubert Pierre-Marie Benoît Schneegans

A micromachined mechanism (5) for a sensing tool (1), the mechanism comprising a support, a probe, pivotally mounted with respect to the support, a beam (10) connected to the support (8), and the probe, the probe (9) being intended to apply a load (Ftool) ...

2022

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

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

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