Publication
Design of an Innovative Cylindrical Spring with a Negative Stiffness
Publications associées (57)
High Permittivity Siloxanes as Promising Materials for Dielectric Elastomer Transducers: From Synthesis to Application
The speed of change in the modern world is impressive. Within the last 50 years, many devices and technologies have significantly transformed their appearance, intrinsic characteristics and improved their performance. Computers have changed from the size o ...
EPFL2022Control-oriented modeling and analysis of tubular dielectric elastomer actuators dedicated to cardiac assist devices
Yves Perriard, Yoan René Cyrille Civet, Thomas Guillaume Martinez, Armando Matthieu Walter, Ning Liu
This paper deals with the control-oriented modeling of a multilayered dielectric elastomer actuator based tube. The actuator is clamped at both sides and performs a radial displacement. The hyperelastic deformation and the viscoelastic performance, togethe ...
2022Actuator, valve actuator unit and valve
Herbert Shea, Fabio Beco Albuquerque
An actuator (22) comprises at least one actuator body (32) of dielectric elastomeric material and two electrodes (34, 36) being attached to opposite surfaces of the actuator body (32), respectively. At least one of the actuator body (32) and at least one o ...
2022Design and modelling of a tubular dielectric elastomer actuator with constrained radial displacement as a cardiac assist device
Yves Perriard, Yoan René Cyrille Civet, Armando Matthieu Walter, Jonathan André Jean-Marie Chavanne
In this paper, we propose an improvement of a dielectric elastomer actuator (DEA) based augmented aorta. The actuator is a multi-layered tubular DEA subject to the internal pressure of the blood. When activated in synchronisation with the heart, the DEA su ...
IOP PUBLISHING LTD2021A High Efficiency Pneumatic Drive System Using Vane-Type Semi-Rotary Actuators
A compressed air driven generator is proposed, where the pneumatic energy is converted into mechanical energy using two vane-type rotational actuators. The use of a second actuator with a higher displacement in order to produce a thermodynamic expansion al ...
UNIV NIS2021Sensorless Quasi-static Piezoelectric Actuator for Micro-Robotics
Research interest into the miniaturisation of micro-robots has soared in recent years due to the availability of suitable integrated actuators. The reduction in size of these components is achieved through the implementation of Self-Sensing Actuation (SSA) ...
EPFL2020Design and Thermal-Structural Analyses of Ancillary Components for the Optical Steering Mirror (M4) for the ITER ECH Upper Launcher
Timothy Goodman, René Chavan, Matteo Vagnoni
Each of the four ITER Electron Cyclotron Heating Upper Launcher (ECHUL) features eight transmission lines (TLs) that are used to inject 170-GHz microwave power into the plasma at a level of up to 1.31 MW (at the TL diamond window) per line. The millimeter ...
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2020Dynamically reconfigurable DEAs incorporating shape memory polymer fibers
We present variable stiffness dielectric elastomer actuators (DEAs), combining a single DEA actuator with embedded shape memory polymer (SMP) fibers, which can be electrically addressed to locally reduce the stiffness by a factor of 100. The device accommo ...
SPIE-INT SOC OPTICAL ENGINEERING2019Steerable device and system
Philippe Renaud, Guillaume Cédric Yves Petitpierre
A steerable device for use as e.g. a guidewire for insertion into a subject's body is disclosed. The device features a single side deflection of a bendable portion located at its distal end by application of a longitudinally-directed force either on an inn ...
2019A vibration control strategy using variable stiffness joints
Adaptive joints are structural joints made of materials with enhanced transduction properties that can vary their stiffness via solid-state actuation (e.g. thermal, mechanical). In this work, stiffness tuning is used to switch the joint between a ‘locked’ ...
2018