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Herbert Shea

Cette personne a quitté l’EPFL

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Publications associées (159)

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High-resolution, large-area fabrication of compliant electrodes via laser ablation for robust, stretchable dielectric elastomer actuators and sensors

Herbert Shea, Samuel Rosset, Oluwaseun Adelowo Araromi

A key element in stretchable actuators, sensors and systems based on elastomer materials are compliant electrodes. While there exist many methodologies for fabricating electrodes on dielectric elastomers, very few succeed in achieve high-resolution pattern ...

Amer Chemical Soc2015

Geometric optimization of dielectric elastomer electrodes for dynamic applications

Herbert Shea, Bekir Aksoy

Dielectric elastomers are soft actuators, made of an elastomer membrane sandwiched by compliant electrodes. Because of their high energy density and quick response, they are well suited for dynamic applications such as loudspeakers. Thanks to progress in t ...

ELSEVIER SCI LTD2021

Dynamically reconfigurable DEAs incorporating shape memory polymer fibers

Herbert Shea, Bekir Aksoy

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 ENGINEERING2019

SPACE: the spectroscopic all-sky cosmic explorer

Yi Wang, Stewart Cole, Jean-Paul Richard Kneib, Herbert Shea, Rachel Grange

We describe the scientific motivations, the mission concept and the instrumentation of SPACE, a class-M mission proposed for concept study at the first call of the ESA Cosmic-Vision 2015–2025 planning cycle. SPACE aims to produce the largest three-dimensio ...

Springer Verlag2009

Versatile soft grippers with intrinsic electroadhesion based on multifunctional polymer actuators

Dario Floreano, Herbert Shea, Samuel Rosset, Jun Shintake, Bryan Edward Schubert

A highly versatile soft gripper that can handle an unprecedented range of object types is developed based on a new design of dielectric elastomer actuators employing an interdigitated electrode geometry, simultaneously maximizing both electroadhesion and e ...

Wiley-V C H Verlag Gmbh2016

MEMS for pico- to micro-satellites

Herbert Shea

MEMS sensors, actuators, and sub-systems can enable an important reduction in the size and mass of spacecrafts, first by replacing larger and heavier components, then by replacing entire subsystems, and finally by enabling the microfabrication of highly in ...

2009

Glove- and Sleeve-Format Variable-Friction Electrostatic Clutches for Kinesthetic Haptics

Herbert Shea, Ronan Julien Hinchet

Clothing with integrated high-force actuators enables wearable haptics for immersive virtual reality (VR) and enables soft exoskeletons for rehabilitation or human augmentation. Electrostatic clutches (ESClutches) offer a very-low-energy solution to block ...

WILEY2022

An electroactive polymer energy harvester for wireless sensor networks

Herbert Shea, Samuel Rosset

This paper reports the design, fabrication, and testing of a soft electroactive polymer power generator that has a volume of 1cm(3). The generator provides an opportunity to harvest energy from environmental sources to power wireless sensor networks becaus ...

Iop Publishing Ltd2013

Rollable Multisegment Dielectric Elastomer Minimum Energy Structures for a Deployable Microsatellite Gripper

Herbert Shea, Samuel Rosset, Jun Shintake, Volker Gass, Oluwaseun Adelowo Araromi, Muriel Richard

Debris in space presents an ever-increasing problem for spacecraft in Earth orbit. As a step in the mitigation of this issue, the CleanSpace One (CSO) microsatellite has been proposed. Its mission is to perform active debris removal of a decommissioned nan ...

Ieee-Inst Electrical Electronics Engineers Inc2015

Vibration and shock reliability of MEMS: modeling and experimental validation

Herbert Shea, Robert Andrew Lockhart

A methodology to predict shock and vibration levels that could lead to the failure of MEMS devices is reported as a function of vibration frequency and shock pulse duration. A combined experimental–analytical approach is developed, maintaining the simplici ...

Institute of Physics2011

Tunable millimeter-wave phase shifter based on dielectric elastomer actuation

Julien Perruisseau-Carrier, Herbert Shea, Samuel Rosset, Pietro Romano, Oluwaseun Adelowo Araromi

A very low-loss tunable millimeter-wave phase shifter driven by dielectric elastomer actuators (DEAs) is presented. The device consists of a fixed coplanar waveguide (CPW) and two metallic loading strips suspended on an elastomer membrane. The horizontal o ...

American Institute of Physics2014

Biomimetic Underwater Robots Based on Dielectric Elastomer Actuators

Dario Floreano, Herbert Shea, Jun Shintake

Dielectric elastomer actuators (DEAs), a soft actuator technology, hold great promise for biomimetic underwater robots. The high-voltages required to drive DEAs can however make them challenging to use in water. This paper demonstrates a method to create D ...

Ieee2016

Tailoring the hydraulic impedance of out-of-plane micromachined electrospray sources with integrated electrodes

Herbert Shea

Hydraulic impedance is a critical parameter for the operation of electrospray emitters, and for preventing flooding when spraying from arrays of emitters. Controlling flow rate by tuning the flow impedance allows accessing different operating modes, such a ...

American Institute of Physics2009

Reconfigurable and Latchable Shape‐Morphing Dielectric Elastomers Based on Local Stiffness Modulation

Herbert Shea, Bekir Aksoy

Programmable soft materials exhibiting dynamically reconfigurable, reversible, fast, and latchable shape transformation are key for applications ranging from wearable tactile actuators to deployable soft robots. Multimorph soft actuator sheets with high lo ...

2020

Identification of the ECR zone in the SWISSCASE ECR ion source

Herbert Shea

The magnetic field of the permanent magnet electron cyclotron resonance (ECR) ion source SWISSCASE located at the University of Bern has been numerically simulated and experimentally investigated. For the first time the magnetized volume qualified for elec ...

2008

Clutchable Fabric Actuator for Energy-Efficient Wearable Robots

Huapeng Zhang, Herbert Shea

Energy-efficient yet energy-dense soft actuators are essential for untethered wearable robots. This work reports a fabric-like actuator, combining shape memory alloy (SMA) springs and electrostatic clutches (ESClutches). The SMA springs provide high force ...

2024

Actuating droplets with electrowetting: Force and dynamics

Herbert Shea, Robert Marius Hennig

Electrowetting on dielectric (EWOD) allows rapid movement of liquid droplets on a smooth surface, with applications ranging from lab-on-chip devices to micro-actuators. The in-plane force on a droplet is a key indicator of EWOD performance. This force has ...

2024

Measuring electro-adhesion pressure before and after contact

Herbert Shea, Sylvain Thomas Schaller

Electro-adhesion (EA) is a low-power, tunable, fast and reversible electrically-controlled adhesion method, effective on both conducting and insulating objects. Typically, only the electro-adhesive detachment force, i.e., the force required to separate an ...

Nature Portfolio2023

A new concept for a low-cost Earth sensor: Imaging oxygen airglow with arrays of single photon detectors

Edoardo Charbon, Herbert Shea, Cristiano Niclass, Noémy Scheidegger

This paper presents a novel concept for a compact low-cost Earth sensor based on imaging atmospheric oxygen emission at 762nm using arrays of single photon avalanche diodes (SPADs). In both nighttime and daytime there is continuous emission at 762nm due to ...

2007

Stretchable and Transparent THz Reflectarrays Based on PDMS

Juan Ramon Mosig, Herbert Shea, Samuel Rosset, Michele Tamagnone, Santiago Capdevila Cascante, Pietro Romano

2015