Department of Mechanical Engineering, Ajou University, 206 Worldcup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16499, Republic of Korea.
Samsung Advanced Institute of Technology, Samsung Electronics, 130 Samsung-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16678, Republic of Korea.
Nat Commun. 2022 Jul 18;13(1):4155. doi: 10.1038/s41467-022-31893-1.
An artificial muscle actuator resolves practical engineering problems in compact wearable devices, which are limited to conventional actuators such as electromagnetic actuators. Abstracting the fundamental advantages of an artificial muscle actuator provides a small-scale, high-power actuating system with a sensing capability for developing varifocal augmented reality glasses and naturally fit haptic gloves. Here, we design a shape memory alloy-based lightweight and high-power artificial muscle actuator, the so-called compliant amplified shape memory alloy actuator. Despite its light weight (0.22 g), the actuator has a high power density of 1.7 kW/kg, an actuation strain of 300% under 80 g of external payload. We show how the actuator enables image depth control and an immersive tactile response in the form of augmented reality glasses and two-way communication haptic gloves whose thin form factor and high power density can hardly be achieved by conventional actuators.
人工肌肉致动器解决了紧凑可穿戴设备中实际工程问题，这些问题受到传统致动器（如电磁致动器）的限制。抽象出人工肌肉致动器的基本优势，为开发变焦距增强现实眼镜和自然贴合的力觉手套提供了一种具有传感能力的小型、高功率致动系统。在这里，我们设计了一种基于形状记忆合金的轻质高功率人工肌肉致动器，即所谓的柔顺放大形状记忆合金致动器。尽管重量很轻（0.22 克），但该致动器具有 1.7kW/kg 的高功率密度，在 80 克外部负载下的致动应变为 300%。我们展示了致动器如何通过增强现实眼镜实现图像深度控制和沉浸式触觉响应，以及双向通信力觉手套，传统致动器很难实现其薄型外形和高功率密度。
