通过分区充气与体积转移设计,实现轻便高效气动外骨骼。
Using Zone Inflation and Volume Transfer to Design a Fabric-based Pneumatic Exosuit with both Efficiency and Wearability
- 分区充气与体积转移策略优化气路结构,降低空气消耗。
- 实测输出扭矩达9.1Nm,响应时间仅0.5秒,体积仅32mm。
- 适合需要隐蔽性与高效率的可穿戴助力场景。
由于良好的人机交互性能,基于织物的气动外骨骼具有广阔应用前景,但其结构设计范式尚未定型,亟需深入研究。本文提出分区充气与体积转移概念,用于设计兼具效率与可穿戴性的织物基气动外骨骼。分区充气将气囊充气区域划分为充气-泄压区与充气-保持区,可减少压缩空气消耗,提升效率;体积转移是一种气腔区域的战略分布方法,能有效增强外骨骼的可穿戴性。采用廉价热塑性聚氨酯薄膜与服装面料,通过热压与缝制工艺制成外骨骼。该外骨骼响应时间为0.5秒,作用面积为1500mm²,厚度仅32mm,可隐藏于日常衣物中。建立数学模型预测输出扭矩,误差为3.6%。机械实验显示,在100kPa压力下输出扭矩达9.1Nm。表面肌电实验表明,外骨骼可帮助用户完成从坐到站的动作转换,平均肌电信号降低14.95%。该设计融合效率与可穿戴性,有望成为织物基气动外骨骼的理想范式。
原文摘要 · Abstract (English)
Fabric-based pneumatic exosuits have a broad application prospect due to their good human-machine interaction performance, but their structural design paradigm has not yet been finalized and requires in-depth research. This paper proposes the concepts of zone inflation and volume transfer for the design of a fabric-based pneumatic exosuit with both efficiency and wearability. The meaning of zone inflation is to divide the inflation area of pneumatic exosuit into inflation-deflation zone and inflation-holding zone which can reduce the consumption of compressed air and improve efficiency. Volume transfer, a strategic distribution method of inflatable regions inside the garment, can effectively enhance the wearability of the exosuit. Using inexpensive thermoplastic polyurethane film and clothing fabric, the exosuit is made by heat pressing and sewing. The exosuit has a response time of 0.5s, a stress area of 1500mm2, and a profile of only 32mm, which can be hidden inside common clothing. A mathematical model is developed to predict the output torque of the exosuit with an error of 3.6%. Mechanical experiments show that the exosuit outputs a torque of 9.1Nm at a pressure of 100kPa. Surface electromyography experiments show that the exosuit can provide users with a boost from sitting to standing, with an average reduction in electromyography signals of 14.95%. The exosuit designed using these methods synthesizes efficiency and wearability and is expected to be an ideal paradigm for fabric-based pneumatic exosuits.
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