A novel motion platform system for testing prosthetic knees

A novel motion platform system for testing prosthetic knees
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一种用于测试假肢膝关节的新型运动平台系统

DOI:
10.1016/j.measurement.2019.04.073
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发表时间:
2019-11
期刊:
影响因子:
5.6
通讯作者:
Bai Xian-Xu
Bai Xian-Xu
中科院分区:
工程技术2区
文献类型:
--
作者:
Xu Lei;Wang Dai-Hua;Fu Qiang;Yuan Gang;Bai Xian-Xu

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提出了一种新型运动平台系统(NMPS)的原理,用于模拟假膝的随机动力学过程。NMPS通过命令大腿模拟器实时模拟测试者的大腿运动来实现。NMPS包括一个运动平台、一个生物制导单元、一个姿态传感单元和一个控制和数据收集单元。提出了一种间接获取试验机髋关节垂直运动的方法,并进行了实验验证。制作了NMPS的原型。该原型模拟测试者大腿运动的能力在加速/减速步行速度下进行了实验测试。相应的,对所研制的基于磁流变效应(FLPKME)的四连杆假膝的摆角进行了实验测试和分析。实验结果表明,所开发的NMPS能够准确模拟未截肢健康个体大腿随机动态过程中的振幅和速度变化。
The principle of a novel motion platform system (NMPS) for testing prosthetic knees (PKs) is proposed to imitate the stochastic dynamic processes. The NMPS is realized by commanding a thigh simulator to imitate thigh motions of a tester in real time. The NMPS includes a motion platform, a bio-guided unit, a posture sensing unit, and a control and data collection unit. An indirect approach to obtain the vertical motion of the tester’s hip joint is proposed and experimentally validated. The prototype of the NMPS is fabricated. The prototype’s ability to imitate the tester’s thigh motions is experimentally tested at an accelerated/decelerated walking speed. Correspondingly, the swing angle of the developed four-bar linkage prosthetic knee based on magnetorheological effect (FLPKME) is experimentally tested and analyzed. The experimental results indicate that the developed NMPS can accurately imitate the amplitudes and speeds changing in the stochastic dynamic processes of the healthy un-amputated individual’s thigh.
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