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Gait motion simulator for kinematic tests of above knee prostheses

机译：步态运动模拟器，用于膝上假体的运动学测试

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摘要

In this study, a basic gait motion simulator mechanism combining control units and electromechanic hardware has been proposed and implemented for the test stages of knee prostheses. The main goal to develop such simulator equipment is to regenerate predefined and controllable periodic movement, specifically hip vertical displacement and thigh angle motion applied to above-knee prosthesis so that test studies will be less dependent to human trials in any development phase. Gait motion simulator performance tests were conducted with both an image-based motion measurement system and a direct-type motion measurement system. In the hip simulator performance evaluation phase, accelerometer and video signals were collected simultaneously from the experimental system for kinematic analysis. The overall system consists of a hip simulator, a microcontroller-controlled prosthetic knee and a solid ankle cushion heel foot on a treadmill. Experimental results were evaluated for assessing the degree of approximation of the natural periodic hip movement by designed electromechanical simulator. The analysis showed that the test platform presented in this study is a useful yet low budget alternative to more expensive general-purpose electromechanic test devices for development purposes.
机译：在这项研究中，提出了一种基本步态运动模拟器机制，该机制将控制单元和机电硬件相结合，并用于膝关节假体的测试阶段。开发这种模拟器设备的主要目标是再生预定义和可控制的周期性运动，特别是应用于膝盖上方假体的髋部垂直位移和大腿角度运动，从而使测试研究在任何开发阶段都将更少地依赖于人体试验。使用基于图像的运动测量系统和直接型运动测量系统都进行了步态运动模拟器性能测试。在髋关节模拟器性能评估阶段，同时从实验系统中收集了加速度计和视频信号，以进行运动学分析。整个系统由髋关节模拟器，微控制器控制的假肢膝盖和跑步机上坚固的脚踝脚后跟脚组成。通过设计的机电模拟器评估了实验结果，以评估自然周期性髋关节运动的近似程度。分析表明，出于开发目的，本研究中介绍的测试平台是替代更昂贵的通用机电测试设备的一种有用且低成本的选择。

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