Ultrafast, miniature soft actuators

被引：0

作者：

Bas O. ^{[1
,2
]}

Gorissen B. ^{[3
]}

Luposchainsky S. ^{[2
,4
]}

Shabab T. ^{[2
]}

Bertoldi K. ^{[3
]}

Hutmacher D.W. ^{[1
,2
]}

机构：

[1] ARC Industrial Transformation Training Centre in Additive Biomanufacturing, Queensland University of Technology (QUT), Brisbane, 4059, QLD

[2] School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT), Brisbane, 4001, QLD

[3] Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, 02138, MA

[4] Department of Functional Materials in Medicine and Dentistry, University of Würzburg, Pleicherwall 2, Würzburg

来源：

Multifunctional Materials | 2021年 / 4卷 / 04期

基金：

澳大利亚研究理事会;

关键词：

Actuators; Composites; Fast; Fibers; Inflatable; Soft robotics;

D O I：

10.1088/2399-7532/ac2faf

中图分类号：

学科分类号：

摘要：

The quest for an advanced soft robotic actuator technology that is fast and can execute a wide range of application-specific tasks at multiple length scales is still ongoing. Here, we demonstrate a new design and manufacturing strategy that leads to high-speed inflatable actuators exhibiting diverse movements. Our approach leverages the concept of miniaturisation to reduce the required volume of fluid for actuation as well as fibre-reinforcement to improve the efficiency of actuators in converting delivered fluids into fast and predictable movement. To fabricate the designs, we employ a class of additive manufacturing technology called melt electrowriting. We demonstrate 3D printing of microfibre architectures on soft elastomers with precision at unprecedently small length scales, leading to miniaturised composite actuators with highly controlled deformation characteristics. We show that owing to their small dimensions and deterministically designed fibrous networks, our actuators require extremely low amounts of fluid to inflate. We demonstrate that actuators with a length of 10-15 mm and an inner diameter 1 mm can reach their full range of motion within ∼20 ms without exploiting snapping instabilities or material non-linearities. We display the speed of our actuators by building an ultrafast, soft flycatcher. We also show that our actuators outperform their counterparts with respect to achievable movement diversity and complexity. © 2021 IOP Publishing Ltd

引用

共 49 条

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