Design and Qualitative Testing of a Prosthetic Foot With Rotational Ankle and Metatarsal Joints to Mimic Physiological Roll-Over Shape
Design and Qualitative Testing of a Prosthetic Foot With Rotational Ankle and Metatarsal Joints to Mimic Physiological Roll-Over Shape
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具有旋转踝关节和跖骨关节以模仿生理翻滚形状的假足的设计和定性测试
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发表时间：
2015
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通讯作者：
A. Winter
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作者：
Kathryn M. Olesnavage;A. Winter
本文介绍了在印度使用的原型假肢脚的分析、设计和初步测试。讨论了一个由踝关节和跖关节组成的刚性结构和弹簧提供的旋转刚度的概念。由于文献表明，具有与生理足相似的侧翻形状的假肢足可以使步态更加对称，因此对关节刚度进行了优化，以获得原型侧翻形状与生理足的最佳拟合。使用一组已公布的56.7 kg受试者的步态数据，发现在允许自然步态所需运动的情况下，侧翻形状的最佳刚度值为脚踝处9.3 N·m/度，跖骨处2.0 N·m/度。所得到的侧翻形状与生理侧翻形状的R2值为0.81。原型车是在印度斋浦尔建造和测试的。测试的初步定性反馈是积极的，足以保证进一步开发这一设计概念。ASME版权所有©2015
This paper presents the analysis, design, and preliminary testing of a prototype prosthetic foot for use in India. A concept consisting of a rigid structure with rotational joints at the ankle and metatarsal with rotational stiffnesses provided by springs is discussed. Because literature suggests that prosthetic feet that exhibit roll-over shapes similar to that of physiological feet allow more symmetric gait, the joint stiffnesses were optimized to obtain the best fit between the roll-over shape of the prototype and of a physiological foot. Using a set of published gait data for a 56.7 kg subject, the optimal stiffness values for roll-over shape that also permit the motion required for natural gait were found to be 9.3 N·m/deg at the ankle and 2.0 N·m/deg at the metatarsal. The resulting roll-over shape has an R2 value of 0.81 when compared with the physiological roll-over shape. The prototype was built and tested in Jaipur, India. Preliminary qualitative feedback from testing was positive enough to warrant further development of this design concept.Copyright © 2015 by ASME