针对上肢高位截肢者的肌电假肢设计

给出了一种基于人体表面肌电信号控制的上肢假肢系统,服务于基于靶向肌肉神经移植术的高位截肢者.通过解析人体肌电信号包含的动作意图控制假肢的运动.系统包括假肢的机械结构、控制系统的硬件和算法.假肢的机械结构包括肘关节、腕关节和手部.控制系统的硬件包括主控板、驱动板和肌电采集模块.模式识别算法采用基于贝叶斯原理的线性分类器,通过在线实时训练,得到需要的线性分类器参数.根据得到的分类器模型,对采集到的肌电信号进行在线实时识别,并根据识别的结果实时控制相应假肢关节的运动.系统样机在健康受试者身上进行了测试,效果良好.

Design of myoelectric upper-limb prosthesis towards amputees with high-level amputation

A prosthesis system driven by surface electromyography(sEMG)is introduced,aiming at serving for amputees with high-level amputation.The prosthesis movement is controlled by users'motion intention,which is derived by corresponding sEMG signals.The whole system includes three subsystems:A prosthesis structure with an elbow joint,a wrist joint,and a hand;a hardware control platform,including a main control board,three driver boards,and five sEMG collection modules. Pattern recognition algorithm based on linear discriminant analysis (LDA).The parameters of LDA are gotten by online training.Motion intention is identified based on LDA with the collected sEMG signals. Subsequently,the prosthesis is controlled by the recognition output of LDA. The performance of the prototype is verified on healthy subjects.