用折纸结构设计可定制手腕矫形器,实现多方向灵活运动。
Designing Kresling Origami for Personalised Wrist Orthosis
- 基于Kresling折纸结构,通过可变形拓扑实现个性化适配。
- 单根腱索驱动最大弯曲角达32.63°,组合驱动可完成投掷动作。
- 适合康复训练与个性化穿戴,兼具柔性和可调节性。
手腕在手部灵巧运动中起关键作用。从被动支具到主动外骨骼,腕部矫形器为运动功能辅助与康复提供了有效方案。然而现有产品运动模式有限,且缺乏个性化设计。本文提出一种受Kresling折纸启发的新型腕部矫形器设计,其可通过拓扑变化和本征柔性适应不同个体形态参数。采用热封织物模拟非刚性折纸特性,具备六种独立运动模式,支持可拆卸腱索驱动系统。实验通过单独激活腱索对工作空间进行表征:各方向最大弯曲角在18.81°至32.63°之间;组合牵引时,背侧、掌侧、桡侧及尺侧最大弯曲角分别为31.66°、30.38°、27.14°和14.92°。实验还验证了复杂运动如投掷动作与环转运动的可行性。该研究为个性化腕部矫形器的训练与康复应用奠定了良好基础。
原文摘要 · Abstract (English)
The wrist plays a pivotal role in facilitating motion dexterity and hand functions. Wrist orthoses, from passive braces to active exoskeletons, provide an effective solution for the assistance and rehabilitation of motor abilities. However, the type of motions facilitated by currently available orthoses is limited, with little emphasis on personalised design. To address these gaps, this paper proposes a novel wrist orthosis design inspired by the Kresling origami. The design can be adapted to accommodate various individual shape parameters, which benefits from the topological variations and intrinsic compliance of origami. Heat-sealable fabrics are used to replicate the non-rigid nature of the Kresling origami. The orthosis is capable of six distinct motion modes with a detachable tendon-based actuation system. Experimental characterisation of the workspace has been conducted by activating tendons individually. The maximum bending angle in each direction ranges from 18.81° to 32.63°. When tendons are pulled in combination, the maximum bending angles in the dorsal, palmar, radial, and ulnar directions are 31.66°, 30.38°, 27.14°, and 14.92°, respectively. The capability to generate complex motions such as the dart-throwing motion and circumduction has also been experimentally validated. The work presents a promising foundation for the development of personalised wrist orthoses for training and rehabilitation.
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