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Bekir Aksoy¹, Sylvia Tan¹, Michael A Peshkin¹

¹Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA.

Science advances

|February 14, 2025

概括

新的可变形体骨折机制揭示了不均的应力导致电 (EA) 离合器故障. 新的EA离合器通过均分配应力,在低电压下实现高力,从而实现先进的机器人和触觉.

科学领域:

机器人与机械工程机器人与机械工程
材料科学材料科学材料科学
生物力学生物力学

背景情况:

电粘 (EA) 离合器为机器人,触觉和康复中的运动控制提供了紧,轻量级的解决方案.
目前EA离合器性能的局限性归因于在低电压下产生不足的力,这是由于缺乏机械理解.

研究的目的:

用先进的断裂力学研究电离合器的故障机制.
开发高性能EA离合器,能够在低工作电压下提供显著的力.

主要方法:

采用了一种新的可变形体骨折力学方法.
使用高分辨率的应变场成像来分析应力分布.
为了优化应力分布,EA离合器经过重新设计,采用了柔软的中间层和剥离式堵塞.

主要成果:

不均的应力分布被确定为EA离合器通过分层和裂传播故障的主要原因.
开发的EA离合器在100V时表现出22N/cm2的持续力,实现了每电压最高的应力.
通过改善应力分布,故障模式成功地得到了缓解.

结论:

了解应力分布对于设计高性能EA离合器至关重要.
新设计使低压,高力EA离合器适用于先进的应用.
整合的可穿戴系统用于康复和触觉证明了这些增强EA离合器的实际实用性.

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