Concept
Horloge électrique
Publications associées (52)
DASS: Combining Dynamic & Static Scheduling in High-Level Synthesis
A central task in high-level synthesis is scheduling: the allocation of operations to clock cycles. The classic approach to scheduling is static, in which each operation is mapped to a clock cycle at compile-time, but recent years have seen the emergence o ...
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022Rocker 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 ...
2021Control-Free Mechanical Oscillator Powered by Shape Memory Alloys
Yves Perriard, Paolo Germano, Thomas Guillaume Martinez, Sean Thomas
Shape Memory Alloy (SMA) based actuators have been commonly used in applications that require being compact and lightweight. In this paper, the inherent stiffness of a flexure-based linear guide is used to create a bias-spring SMA actuator which further re ...
IEEE2021Combining Dynamic & Static Scheduling in High-level Synthesis
A central task in high-level synthesis is scheduling: the allocation of operations to clock cycles. The classic approach to scheduling is static, in which each operation is mapped to a clock cycle at compile-time, but recent years have seen the emergence o ...
ASSOC COMPUTING MACHINERY2020Flexure Pivot Oscillator With Intrinsically Tuned Isochronism
Simon Nessim Henein, Ilan Vardi, Etienne Frédéric Gabriel Thalmann, Mohammad Hussein Kahrobaiyan
The most important property for accurate mechanical time bases is isochronism: the independence of period from oscillation amplitude. This paper develops a new concept in isochronism adjustment for flexure-based watch oscillators. Flexure pivot oscillators ...
2020L2 output feedback control of delayed linear parameter varying systems with piecewise constant parameters: A clock-dependent L-K approach
This article proposes a new clock-dependent gain-scheduled dynamic output feedback controller for delayed linear parameter varying systems with piecewise constant parameters. The proposed controller guarantees Script capital L2-performance. By employing a ...
2020Conceptual design of a rotational mechanical time base with varying inertia
Simon Nessim Henein, Etienne Frédéric Gabriel Thalmann
Flexure pivot oscillators have the potential to advantageously replace the traditional balance wheel-spiral spring oscillator used in mechanical watches due to their significantly lower friction. However, they have inherent nonlinear elastic properties tha ...
2019Programmable Multistable Mechanisms: Design, modeling, characterization and applications
Mohamed Gamal Abdelrahman Ahmed Zanaty
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 ...
EPFL20183D printed microwave cavity for atomic clock applications: proof of concept
Anja Skrivervik, Emile Jacques de Rijk
The authors present the realisation and characterisation of an additively manufactured (AM) microwave resonator cavity for double-resonance (DR) vapour-cell atomic clocks. The design of the compact microwave cavity is based on the loop-gap resonator approa ...
2018MEMS Generator Study for an Embedded Energy Harvesting System
This work has been triggered by an industrial project targeting the development of a novel regulation system for a mechanical watch. Mechanical watches have been known for over a century as one of the finest example of energy autonomous devices, embodying ...
EPFL2018