Motorizing the buckled blister for rotary actuation
Pengfei Yang , Ruixing Huang , Fei Dang , Baoxiang Shan , Dewen Wang , Hong Liu , Yi Li , Xiangbiao Liao
Exploration ›› 2024, Vol. 4 ›› Issue (5) : 20230055
Motorizing the buckled blister for rotary actuation
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 potentialwells.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 localizedpneumatic actuators.Withbroadchoices of stimulus andmaterial for rings, the findings illustrate the promising potential of two nested rings to create activemotions for diverse applications including gearlessmotors, peristaltic pumps, and locomotive robots.
buckling / rotary actuation / rotary mechanism / snap-through bistability
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2024 The Author(s). Exploration published by Henan University and John Wiley & Sons Australia, Ltd.
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