Biomechanical Analysis of the Effect of the Finger Extensor Mechanism on Hand Grasping Performance
Biomechanical Analysis of the Effect of the Finger Extensor Mechanism on Hand Grasping Performance
复制标题
手指伸肌机构对手部抓取性能影响的生物力学分析
DOI：
10.1109/tnsre.2022.3146906
复制
发表时间：
2022
影响因子：
4.9
通讯作者：
G. Wei
中科院分区：
文献类型：
--
作者：
Yuyang Wei;Z. Zou;Z. Qian;L. Ren;G. Wei
量化手指相互连接的手指扩展机制的路由和拓扑效果是对更好的临床诊断，外科手术计划和仿生手的长期研究问题。在手动操纵过程中，诸如接触力和接触区域之类的参数也很难通过物理手部模型复制在这项研究中，首次使用经过实验性验证的受试者的有限元（Fe）手部模型来量化不同肌腱拓扑的影响和材料对手掌握质量的影响。如果没有扩展引擎盖和横向带，则将减少15.94％和8.54％，前者在传输力和保持抓地力方面起着更重要的作用与后者的质量相比，拓扑中的引擎盖会导致降低手的接触压力和接触面积，而忽略了横向带的7.5％确实提高了抓地力的质量，但是一旦肌腱的模量增加了50％以上，增强效果趋于平稳。扩展的引擎盖是维持抓地力的关键组成部分，可以通过整合这两个组件来改善机器人和假肢的抓地力。抓握质量。
Quantifying the effect of routing and topology of the inter-connected finger extensor mechanism on hand grasping performances is a long-standing research problem for the better clinical diagnosis, surgical planning and biomimetic hand development. However, it is technically demanding to measure the hand performance parameters such as the contact forces and contact area during hand manipulation. It is also difficult to replicate human hand performance through the physical hand model due to its sophisticated musculotendinous structure. In this study, an experimental validated subject-specific finite element (FE) human hand model was used for the first time to quantify the influence of different tendon topologies and material properties on hand grasping quality. It is found that the grasping quality is reduced by 15.94% and 8.54% if there are no extensor hood and lateral band respectively, and the former plays a more important role in transmitting forces and maintaining grasping qualities than the latter. Excluding extensor hood in the topology causes more reductions in hand contact pressure and contact area than omitting lateral band. 7.5% of the grasping quality is lost due to a softened tendon with half of its original Young’s Modulus. Hardened extensor tendon does increase the grasping quality, but the enhancing effect tends to level off once the tendon Young’s Modulus is increased by more than 50%. These results prove that the lateral band and extensor hood are critical components for maintaining grasping quality. The dexterity and grasping quality of robotic and prosthetic hands could be improved by integrating these two components. There is also no need to use very stiff tendon material as it won’t help to effectively enhance the grasping quality.