Publications de Patrick Robert Flückiger

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

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

La géométrie du tourbillon

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

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

Homogeneous light stimulation of melanopsin and cones with a Maxwellian view device for the human eye

Gilles Evéquoz, Patrick Robert Flückiger

We designed and tested a device to stimulate specifically one photoreceptor type, or a combination of some of them, of the human eye by using up to six primaries. The device produces a homogeneous light field over 40 degrees which is projected onto the ret ...

IEEE2021

Foucault pendulum properties of spherical oscillators

Simon Nessim Henein, Ilan Vardi, Patrick Robert Flückiger

The Foucault pendulum provides a demonstration of the turning of the Earth. The principle at work is that linear oscillations of a two-degree-of-freedom isotropic harmonic oscillator remain unchanged in an inertial frame of reference, so appear to precess ...

2020

Foucault pendulum properties of spherical oscillators

Simon Nessim Henein, Ilan Vardi, Patrick Robert Flückiger

In 1851 Léon Foucault created a sensation with his pendulum providing a direct demonstration of the turning of the Earth. This simple device consists of a pendulum which is launched in a purely planar orbit. Following Mach's principle of inertia, the mass ...

euspen2020

Design of a Flexure Based Low Frequency Foucault Pendulum

Simon Nessim Henein, Ilan Vardi, Patrick Robert Flückiger

The Foucault pendulum is a well-known mechanism used to demonstrate the rotation of the Earth. It consists in a pendulum launched on linear orbits and, following Mach’s Principle, this line of oscillation will remain fixed with respect to absolute space bu ...

2020