A5024852389- Piezoelectric Actuators and Control
- Advanced MEMS and NEMS Technologies
- Tactile and Sensory Interactions
- Integrated Circuits and Semiconductor Failure Analysis
- Iterative Learning Control Systems
- Teleoperation and Haptic Systems
- Advanced Optical Imaging Technologies
- VLSI and Analog Circuit Testing
- Soft Robotics and Applications
- Advanced Sensor and Energy Harvesting Materials
- Acoustic Wave Resonator Technologies
- Force Microscopy Techniques and Applications
- Robotic Mechanisms and Dynamics
- Electron and X-Ray Spectroscopy Techniques
- Stroke Rehabilitation and Recovery
- International Science and Diplomacy
- Superconducting Materials and Applications
- Electrowetting and Microfluidic Technologies
- Engineering Applied Research
- Advanced Optical Sensing Technologies
- Advanced Surface Polishing Techniques
- Advanced Energy Technologies and Civil Engineering Innovations
- Micro and Nano Robotics
- Aeroelasticity and Vibration Control
- Bluetooth and Wireless Communication Technologies
École Polytechnique Fédérale de Lausanne
2020-2023
CEA LIST
2012-2023
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2012-2023
Laboratoire Interactions, Dynamiques et Lasers
2012-2023
Interface (United States)
2017
Schlumberger (United States)
2001-2003
Abstract The sense of touch is underused in today’s virtual reality systems due to lack wearable, soft, mm‐scale transducers generate dynamic mechanical stimulus on the skin. Extremely thin actuators combining both high force and large displacement are a long‐standing challenge soft actuators. Sub‐mm thick flexible hydraulically amplified electrostatic reported here, capable out‐of‐plane in‐plane motion, providing normal shear forces user’s fingertip, hand, or arm. Each actuator consists...
Abstract The ability to mechanically stimulate touch receptors over the entire body is a key feature for fully immersive and highly realistic virtual reality experience. Haptic stickers, flexible arrays of HAXELs (hydraulically amplified TAXels), that enable cutaneous haptics nearly all parts body, are reported. zipping electrostatic actuators combine stretchable elastomers high permittivity films generate both strains forces, from DC 200 Hz. A fabrication process enables scaling 2 15 mm in...
Abstract The ability to control high-voltage actuator arrays relies, date, on expensive microelectronic processes or individual wiring of each a single off-chip switch. Here we present an alternative approach that uses on-chip photoconductive switches together with light projection system individually address actuators. Each is connected one more are nominally OFF unless turned ON using direct illumination. We selected hydrogenated amorphous silicon (a-Si:H) as our material, and provide...
Inertially stabilized platforms are widely used in order to provide a stable line-of-sight for optical components such as cameras, lasers or mirrors. They often difficult miniaturize because of the need multiple degrees freedom and high dynamic. Ultrasonic motors an interesting solution since they can torque at low speed without extra mechanical parts.
Piezo-electric motors are interesting candidates and a good alternative solution to electromagnetic actuation. A limited number of mechanical components is required which leads simple compact designs. high resolution repeatability can be reached. They do not generate noise nor magnetic fields make them easy integrate in different environments. Nevertheless, some limitations remain such as the difficulty create piezo-electric motor with torque capabilities.
In this paper, we address the issues of global ultra-thinning (/spl les/10 /spl mu/m) flip chips and develop a reliable inexpensive process based on conventional lapping tool compact thickness monitoring system. The mechanical electrical yields as result are reported. commonly seen die warpage in flip-chip packaging is discussed addressed thinning since level can be much more than final target thickness. Finally present preliminary results using CNC milling approach with hope to open door...
We present a new method for electrode design in order to improve efficiency of energy conversion piezoelectric elements used as longitudinal-bending actuators. An analytical electromechanical coupling calculation based on strain analysis element is presented. This allows simple computation set electrodes associated with given stimulated mode. propose an optimal pattern the case ultrasonic curved actuator.
This paper presents the preliminary work on a new concept of piezoelectric moto-reducer for high torque application. It combines an ultrasonic motor based simple disk-shaped buzzer with flat strain wave reducer.
We present a method to control individual high-voltage actuators in an array using microfabricated photoconductive switches and light projection system, thus overcoming the challenges of on-chip at high voltages. Such switching capabilities go beyond - our proposed approach may open door simple other processes, such as MEMS, pressure sensors, RF devices.
<div class="section abstract"><div class="htmlview paragraph">This paper describes the feasibility of a de-icing device based on forced vibrations induced in an ice-covered rectangular aluminum plate using amplified piezoelectric actuator. The removal ice layer is caused by creation mechanical stresses relatively fast time-varying mode shapes very low kHz-range large enough to overcome adhesion forces at material/ice interface.</div></div>
We present a very thin, fast and flexible fluidic valve based on hydraulically amplified dielectric actuator. A thin cavity made by bonding membranes including central stretchable region of silicone is filled with fluid. Under an electric field, the fluid displaced from edges to region, inflating center actuator closing valve. The dimensions are less than 10x10x1mm. can block pressure up 1Bar in 10ms for 1 mm diameter inlet using voltage 1.4kV. Arrays such valves easily fabricated...
The ability to control high-voltage actuator arrays relies, date, on expensive microelectronic processes or individual wiring of each a single off-chip switch. Here we present an alternative approach that uses on-chip photoconductive switches together with light projection system individually address actuators. Each is connected one more are nominally OFF unless turned ON using direct illumination. We selected hydrogenated amorphous silicon as our material, and provide complete...
A flexible array of high-force and high-stroke mm-scale actuators for wearable haptics will be presented. The soft are capable both out-of-plane motion in-plane motion, allowing the user to feel normal forces shear from same active bump. Combining features DEAs HASEL devices, each actuator consists an oil-filled cavity made a metalized polymer perimeter central elastomer region. When voltage is applied electrodes, fluid rapidly forced into region, forming Each generates up 300 mN...