Abstract

As soft robots have been popular, interest in soft actuators is also increasing. In particular, new types of actuators have been proposed through biomimetics. An actuator that we proposed in this study was inspired by a motor cell that enables plants to move. This actuator is an electrostatic actuator utilizing electrostatic attraction and elastic force, and can be used repeatedly. In addition, this actuator, which can produce large and diverse movements by collecting individual movements like a cell, has a wide application field. As one of them, this actuator is stacked to construct a layer structure and propose an application example. In addition, a piezo sensor was built inside the actuator and real-time motion monitoring was attempted. As a result, the point laser sensor value and the piezo sensor value coincided with each other, which means that it is possible to detect motion in real-time with the built-in sensor.

Highlights

  • Soft robots are an indispensable device to be used in various fields

  • The soft robots have already been obtained through a biomimetic technique and have been introduced (Majidi, 2014)

  • At the hemispherical structure consisting of iron oxide–silicone mixture, there is carbon tape for conduction inside and a hole for air intake and exhaust (Figure 1E)

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Summary

Introduction

Soft robots can use dexterous mobility by using mechanisms different from conventional hard robots and it guarantees great potential beyond previous limitations (Trivedi et al, 2008; Laschi and Cianchetti, 2014; Martinez et al, 2014; Rus and Tolley, 2015). Earthworm robots, and jellyfish robot were developed by mimicking locomotion of microorganisms and mollusks (Quillin, 1998; Yeom and Oh, 2009; Palagi et al, 2016; Shintake et al, 2018; Wen et al, 2018) For these smooth motions, soft actuators are essential. Inspired by nature including starfish and octopus’s arm, the new types of soft actuators were developed (Trivedi et al, 2008; Laschi et al, 2009, 2012; Yoshida, 2010)

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