Multimode Hydraulically Amplified Electrostatic Actuators for Wearable Haptics

@article{Leroy2020MultimodeHA,
  title={Multimode Hydraulically Amplified Electrostatic Actuators for Wearable Haptics},
  author={Edouard Leroy and Ronan Hinchet and Herbert R. Shea},
  journal={Advanced Materials},
  year={2020},
  volume={32}
}
The sense of touch is underused in today’s virtual reality systems due to lack of wearable, soft, mm‐scale transducers to generate dynamic mechanical stimulus on the skin. Extremely thin actuators combining both high force and large displacement are a long‐standing challenge in soft actuators. Sub‐mm thick flexible hydraulically amplified electrostatic actuators are reported here, capable of both out‐of‐plane and in‐plane motion, providing normal and shear forces to the user’s fingertip, hand… 
A Soft Touch: Wearable Tactile Display of Softness Made of Electroactive Elastomers
Fingertip‐mounted tactile displays of softness are needed for various virtual‐ or augmented‐reality applications such as surgical simulation, tele‐operation, computer‐aided design, 3D model
A Soft Electro-Hydraulic Pneumatic Actuator with Self-Sensing Capability toward Multi-Modal Haptic Feedback
Haptic feedback is appealing for achieving the realistic perception of environmental changes for human bodies in human–computer interaction fields. However, existing haptic actuators have some
Soft Actuator Materials for Electrically Driven Haptic Interfaces
Haptics involves human touch sensing and tactile feedback and plays a crucial role in physical interactions of humans with their environment. There is an ever‐increasing interest in development of
Untethered Feel‐Through Haptics Using 18‐µm Thick Dielectric Elastomer Actuators
TLDR
The silicone‐based DEA membrane is mechanically transparent, enabling wearable haptics for the many applications where hand dexterity is critical, and can be placed in array format anywhere on the body.
Soft bidirectional haptic I/O module based on bi-convex patterned PVC gel
In this paper, we propose a bidirectional soft haptic I/O module that not only senses the haptic force but also generates a mechanical vibrotactile sensation. Under external pressure, the distance
A Battery-Powered Soft Electromechanical Stimulation Patch for Haptic Human-Machine Interfaces
TLDR
A soft haptics-feedback system using highly charged, polymeric electret films with the annulus-shape bump contact structure to induce mechanical sensations on volunteers under an applied voltage as low as 5 volts is proposed.
Highly pixelated, untethered tactile interfaces for an on-skin telehaptic system
TLDR
Short time Fourier transform analysis showed that the proposed skin-conformable tactile sensor and actuator array can transmit various types of tactile stimuli, such as the shape of objects and letters, textures of fabrics, and vibration patterns with high fidelity.
Valveless microliter combustion for densely packed arrays of powerful soft actuators
TLDR
An array of individually addressable, soft fluidic actuators that operate without electromechanical valves is demonstrated by using microscale combustion and localized thermal flame quenching and it is demonstrated that hyperelastic membranes can be forcefully and quickly displaced.
Wireless Electrohydrodynamic Actuators for Propulsion and Positioning of Miniaturized Floating Robots
TLDR
EHD actuators prove to be a simple, compact, low power alternative to magnetic and acoustic actuators for wireless powering and control of miniaturized robots, with applications in precision assembling at the micro/mesoscale, lab‐on‐chip, tactile displays, and active surfaces.
...
...

References

SHOWING 1-10 OF 47 REFERENCES
Closed-Loop Haptic Feedback Control Using a Self-Sensing Soft Pneumatic Actuator Skin.
TLDR
A closed-loop control over haptic feedback is achieved, first time for an entirely soft platform, in a novel self-sensing soft pneumatic actuator with soft strain sensors, called SPA-skin, which withstands large multiaxial strains and is capable of high-frequency sensing and actuation.
Using Pot-Magnets to Enable Stable and Scalable Electromagnetic Tactile Displays
TLDR
A lightweight and effective magnetic shielding architecture is introduced that reduces the interaction between neighboring magnets by more than one order of magnitude, while the coil/magnet interaction is only reduced by 10 percent.
Electro-Active Polymer Based Soft Tactile Interface for Wearable Devices
TLDR
Analysis of the user tests shows participants perceive variation of protrusion height at the finger pad and modulation of vibration intensity through the proposed soft actuator based tactile interface.
Hydraulically amplified self-healing electrostatic actuators with muscle-like performance
TLDR
A class of soft actuators is described, termed hydraulically amplified self-healing electrostatic (HASEL) actuators, which harness a mechanism that couples electrostatic and hydraulic forces to achieve a variety of actuation modes and demonstrate their robust, muscle-like performance as well as their ability to repeatedly self- heal after dielectric breakdown.
Peano-HASEL actuators: Muscle-mimetic, electrohydraulic transducers that linearly contract on activation
TLDR
A class of fast, muscle-mimetic actuators uses electrohydraulic coupling to linearly contract on activation in a muscle-like fashion, without rigid frames, prestretch, or stacked configurations, that demonstrates promise for applications such as active prostheses, medical and industrial automation, and autonomous robotic devices.
Three-Dimensional Skin Deformation as Force Substitution: Wearable Device Design and Performance During Haptic Exploration of Virtual Environments
TLDR
These experiments show that three DoF skin deformation enables both stiffness and friction discrimination capability in the absence of kinesthetic force feedback, demonstrating that users can perceive differences in surface friction without world-grounded kinesthetic forces.
Flexible Active Skin: Large Reconfigurable Arrays of Individually Addressed Shape Memory Polymer Actuators
A high‐resolution flexible active skin with a matrix of 32 × 24 individually addressable tactile pixels on a 4 mm pitch is reported, based on shape memory polymer (SMP) actuators. The intrinsic
Refreshable Tactile Display Based on a Bistable Electroactive Polymer and a Stretchable Serpentine Joule Heating Electrode.
TLDR
The fabrication of a 4 × 4 pneumatic tactile display with Braille standard resolution using a bistable electroactive polymer (BSEP) thin film and a serpentine-patterned carbon nanotube electrode to open a path to building compact, user-friendly, and cost-effective tactile devices for a variety of important applications.
A Refreshable Braille Cell Based on Pneumatic Microbubble Actuators
A refreshable Braille cell as a tactile display prototype has been developed based on a 2 x 3 pneumatic microbubble actuator array and an array of commercial valves. The microbubble actuator acting
...
...