Motorizing the buckled blister for rotary actuation

Pengfei Yang, Ruixing Huang, Fei Dang, Baoxiang Shan, Dewen Wang, Hong Liu, Yi Li, Xiangbiao Liao
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Abstract

Snap-through bistability was widely exploited for rapid hopping in micro-electro-mechanical systems and soft robots. However, considerable energy input was required to trigger the transition between discrete buckling states blocked by potential wells. Here a dynamic buckling mechanism of a buckled blister constrained inside an outer ring is explored for eliciting rotary actuation via a localized change of curvature in the blister. Due to rotational invariance of the buckled blister, lower energy supply is required to initiate the snap-through of buckling compared to conventional bistable mechanism. The controllability in rotational speed and output torque of the bimetallic blister-based rotator inside a rigid stator is exhibited, and the locomotion is demonstrated with two elastic rings via localized pneumatic actuators. With broad choices of stimulus and material for rings, the findings illustrate the promising potential of two nested rings to create active motions for diverse applications including gearless motors, peristaltic pumps, and locomotive robots.

Abstract Image

将扣压式泡罩电动化,以实现旋转驱动
在微型机电系统和软机器人中,瞬时双稳态性被广泛用于快速跳跃。然而,要触发被势阱阻断的离散屈曲状态之间的转换,需要大量的能量输入。在此,我们探索了一种受限于外环内的屈曲水泡的动态屈曲机制,以通过水泡局部曲率的变化触发旋转驱动。与传统的双稳态机构相比,由于屈曲水泡的旋转不变性,启动屈曲的快速通过所需的能量更低。研究展示了基于双金属泡罩的旋转器在刚性定子内的旋转速度和输出扭矩的可控性,并通过局部气动致动器演示了两个弹性环的运动。通过对刺激和环材料的广泛选择,研究结果表明两个嵌套环具有为无齿轮电机、蠕动泵和运动机器人等各种应用创造主动运动的巨大潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
17.20
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