CVA患者fes辅助运动的模糊控制实现

Ming-Han Chang, Yu-Leun Chen, Kuang-Ching Wang, T. Kuo
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引用次数: 6

摘要

本研究设计了一种功能电刺激(FES)系统来辅助脑血管意外(CVA)患者的运动康复过程。经皮电刺激胫骨前肌可引起踝关节一定程度的背屈。利用人工神经网络估计刺激水平与踝关节和膝关节角度之间的非线性映射关系。采用基于规则的模糊控制器对激励波形进行实时调整,使其收敛到理想的弯曲角度。提供了一个用户友好的基于windows的界面,其中所有模糊参数和规则都是可调整的,为物理治疗师提供了一个灵活的工具,以找到最适合不同个体的角度。整个系统包括硬件和软件已成功搭建,并在实验室进行了正常受试者的测试;它还被安装在医院里,作为一种运动康复系统,与跑步机一起运行,并将在那里进行临床试验。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Implementation of fuzzy control over FES-assisted locomotion for CVA patients
In this research, an Functional Electrical Stimulation (FES) system has been designed to assist Cerebral Vascular Accident (CVA) patients during the locomotion rehabilitation process. Cutaneous electrical stimulation applied over tibialis anterior muscle induced the ankle's dorsi flexion to certain degrees. An artificial neural network (ANN) was implemented to estimate the nonlinear mapping relation between stimulation levels and both ankle and knee angles for each individual subject. A rule-based fuzzy controller was used to real-time adjust the stimulating waveform so that convergence to a suitable desired flexion angle was achieved. A user friendly Windows-based interface was offered, where all fuzzy parameters and rules are adjustable, offering physical therapists' a flexible tool to find out most suitable angles for different individuals. The whole system including hardware and software has been successfully setup and tested with normal subjects in laboratory; it has also been installed to operate with a treadmill as a locomotion rehabilitation system in the hospital, where clinical tests will be held.
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