Low-Cost High-Voltage Power Supply for Hydraulically Amplified Self-Healing Electrostatic Applications DOI Creative Commons
Levi Tynan, Upul Gunawardana, Ranjith Liyanapathirana

et al.

Machines, Journal Year: 2024, Volume and Issue: 12(11), P. 758 - 758

Published: Oct. 27, 2024

HASEL (Hydraulically Amplified Self-Healing Electrostatic) actuators have gathered momentum in recent years; they are made of very-low-cost materials, making it easy for anyone to develop their own actuators, and “soft” can achieve tasks that very difficult complete with traditional rigid e.g., grasping soft objects. Unfortunately, driven by high-voltage (HV) power supplies, which expensive control accurately scale up multichannel applications, prostheses. This paper presents a low-cost HV supply designed applications generates 2–10 kV DC at 5% the cost existing supplies used actuators. At core our design, there is new strategy based on controlling charging discharging actuator from supply’s low-voltage (LV) side rather than switching optocouplers. Discharge achieved via secondary transformer multiplier circuit, generating negative output capable effectively safely 10 kV.

Language: Английский

A self-powered soft triboelectric-electrohydrodynamic pump DOI Creative Commons
Fangming Li,

Shuowen Sun,

Xingfu Wan

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Feb. 3, 2025

Language: Английский

Citations

2
Monolithic electrostatic actuators with independent stiffness modulation DOI Creative Commons
Yuejun Xu, Jian Wen, Etienne Burdet

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 30, 2025

Abstract Robotic artificial muscles, inspired by the adaptability of biological outperform rigid robots in dynamic environments due to their flexibility. However, intrinsic compliance soft actuators restricts force transmission capacity and response. Biological muscle modulates stiffness damping, varying viscoelastic properties interaction with surroundings. Here we replicate this function electro-stiffened ribbon actuator, a monolithic strong actuator capable high contraction modulation. employs dielectric-liquid-amplified electrostatic forces for contraction, electrorheological fluid rapid (<10 ms) damping adjustments. This seamless integration enables contractile modulation, extending its capability as lightweight variable resistance passive spring over 2.5 times, improves responses, faster contractions attenuation oscillations more than 50%. We demonstrate actuator’s versatility active, dual connection functions, including arm-bending wearable robotics, robotic arms impact muscle-like

Language: Английский

Citations

1
Robust yet Self-Healing Multimodal Actuators Enabled by Noncovalent Assembled Nanostructure DOI

Chuansong Yu,

Daxin Zhang, Zhuo Huang

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

In nature, animals can realize multimodal movements such as walking, climbing, and jumping through transformation in locomotor gaits or form for survival, which is highly desired untethered flexible actuators yet remains challenging. Here, we propose a robust self-healing actuator enabled by noncovalent assembled nanostructures with elaborate regulation of multistage responsive behaviors. Owing to the dynamic interfacial design between multiple components, stimulus be accurately delivered "light-heat-force release" pathway, endowing diverse motion capabilities ability (27 cm, 34 times body length). Moreover, reversible recombination sliding properties network ensure high toughness (81.9 kJ/mol) efficiency (88.2%), greatly benefit long-term service under complex demanding scenarios. This study provides strategy improve their adaptability stability environments.

Language: Английский

Citations

0
Review of Electrohydraulic Actuators Inspired by the HASEL Actuator DOI Creative Commons
Levi Tynan, Upul Gunawardana, Ranjith Liyanapathirana

et al.

Biomimetics, Journal Year: 2025, Volume and Issue: 10(3), P. 152 - 152

Published: March 2, 2025

The muscle-like movement and speed of the electrohydraulic actuator have granted it much attention in soft robotics. Our aim is to review advancements actuators inspired by Hydraulically Amplified Self-healing Electrostatic (HASEL) actuator. With this paper, we focus on performance 21 designs developed across five Universities, ranging from earliest HASEL latest designs. These reported up 60 N forces contracting strains 99%. with best overall so far been Quadrant HEXEL actuator, at University Colorado Boulder. However, notable also HALVE (produced ETH Zürich, Switzerland), which, using a 5 µm PVDF-TrFE-CTFE film relative permittivity 40, produced 100 times electrostatic force any under review. latter shows that there room for improvement as low displacement still limit viability real-life applications.

Language: Английский

Citations

0
Ultralight Thin-Film Flexible Actuators Based on Shape Memory Alloy DOI
Xiaozhou Lü,

Yiyang Liu,

Yaoguang Shi

et al.

International Journal of Mechanical Sciences, Journal Year: 2025, Volume and Issue: unknown, P. 110437 - 110437

Published: May 1, 2025

Language: Английский

Citations

0
Functional Fluid‐Based Soft Robotic Actuation DOI
Chao Zhang,

Yiman Duan,

Z. Jiao

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: June 1, 2025

Abstract Soft robots actuated by fluids offer a series of inherent benefits, including safe human–robot interaction, cost‐effectiveness, and geometry adaptability for manipulating delicate objects, making them highly promising in wearable devices, medical equipment, bio‐inspired robots, etc. However, the foremost challenge fluidic actuation lies developing standardized, universal methods that are flexible, portable, powerful, fast, low‐cost, safe, rather than still relying on existing rigid pumps valves originally developed traditional mechatronic systems. Recent advancements responsive fluid materials have enabled emergence novel functional technologies convert electrical, magnetic, thermal, chemical, acoustic energies into energy without mechanical movable components. These great potential to provide powerful customized soft robotics. Here, generated from different energies, their basic principles, structure designs, robotic applications introduced. Finally, advantages disadvantages discussed, future trends prospected. It is hoped this review can guidance development technology specifically tailored

Language: Английский

Citations

0
Template-free 3D programmable magnetization of soft millirobots induced by interlayer stress DOI Creative Commons
Jie Han, Shuideng Wang, Zhiqiang Zheng

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2025, Volume and Issue: 122(23)

Published: June 4, 2025

Soft magnetic miniature devices are crucial for applications in minimally invasive medicine, soft electronics, and robotics. While substantial progress has been made, current programming techniques inherently tied to template-based sequential fabrication processes. These processes limit scalability, precision, programmability. Here, we present a template-free, integrative strategy that leverages interlayer stress-induced 3D shape morphing xerogel-PDMS bilayer materials triggered by temperature variations. This process induces preprogrammed deformation fixes the structure via stress solid–liquid phase transition. It is akin an insect encased amber, resulting machine with precisely tailored domains upon saturated magnetization. The approach eliminates need predesigned molds, which offers scalable, template-free programmable magnetization, reducing time labor costs. versatility of this method demonstrated through reconfigurable mechanical behavior kirigami metamaterial structures, information encryption, multilegged millirobots. Moreover, incorporating nonmagnetic PDMS layer, laser-based engraving ablation allow simultaneous control material properties. facilitates precise regulation magnetically responsive regions 20 μm resolution over 1.8 T magnetization strength. significantly enhances design flexibility, machining mass production. paves way advanced multiscale devices.

Language: Английский

Citations

0
A Review of Soft Robotic Actuators and Their Applications in Bioengineering, with an Emphasis on HASEL Actuators’ Future Potential DOI Creative Commons

Osura Perera,

Ranjith Liyanapathirana, Gaetano D. Gargiulo

et al.

Actuators, Journal Year: 2024, Volume and Issue: 13(12), P. 524 - 524

Published: Dec. 18, 2024

This review will examine the rapidly growing field of soft robotics, with a special emphasis on robotic actuators and their applications in bioengineering. Bioengineering has increasingly utilized robotics due to mechanical adaptability flexibility, including drug delivery, assistive wearable devices, artificial organs, prosthetics. Soft applications, as well responsive mechanisms employed include electrical, magnetic, thermal, photo-responsive, pressure-driven actuators. Special attention is given hydraulically amplified self-healing electrostatic (HASEL) biomimetic properties innovative combination dielectric elastomer (DEAs) hydraulic actuators, which eliminates limitations each actuator while introducing capabilities such self-healing. HASEL combine fast response self-sensing features DEAs, force generation systems. Their ability from electrical damage not only makes HASELs unique technology among others but also them promising for long-term bioengineering applications. A key contribution this study comparative analysis presented detailed tables. The performance assessed against common set critical parameters, specific power, strain, maximum actuation stress, energy efficiency, cycle life, capabilities. identified some important research gaps potential areas where may still be developed future. Future should focus improvements power supply design, material durability, enhanced efficiency. serve an intermediate reference researchers system designers, guiding next advancements within

Language: Английский

Citations

2
Low-Cost High-Voltage Power Supply for Hydraulically Amplified Self-Healing Electrostatic Applications DOI Creative Commons
Levi Tynan, Upul Gunawardana, Ranjith Liyanapathirana

et al.

Machines, Journal Year: 2024, Volume and Issue: 12(11), P. 758 - 758

Published: Oct. 27, 2024

HASEL (Hydraulically Amplified Self-Healing Electrostatic) actuators have gathered momentum in recent years; they are made of very-low-cost materials, making it easy for anyone to develop their own actuators, and “soft” can achieve tasks that very difficult complete with traditional rigid e.g., grasping soft objects. Unfortunately, driven by high-voltage (HV) power supplies, which expensive control accurately scale up multichannel applications, prostheses. This paper presents a low-cost HV supply designed applications generates 2–10 kV DC at 5% the cost existing supplies used actuators. At core our design, there is new strategy based on controlling charging discharging actuator from supply’s low-voltage (LV) side rather than switching optocouplers. Discharge achieved via secondary transformer multiplier circuit, generating negative output capable effectively safely 10 kV.

Language: Английский

Citations

1