Design method and verification of a hybrid prosthetic mechanism with energy-damper clutchable device for transfemoral amputees  

作　　者：Majun SONG Sheng GUO Anderson S.OLIVEIRA Xiangyang WANG Haibo QU 

机构地区：[1]School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China [2]Department of Materials and Production,Aalborg University,Aalborg 9220,Denmark

出　　处：《Frontiers of Mechanical Engineering》2021年第4期747-764,共18页机械工程前沿（英文版）

摘　　要：Transfemoral amputees(TAs)have difficulty in mobility during walking,such as restricted movement of lower extremity and body instability,yet few transfemoral prostheses have explored human-like multiple motion characteristics by simple structures to fit the kinesiology,biomechanics,and stability of human lower extremity.In this work,the configurations of transfemoral prosthetic mechanism are synthesized in terms of human lower-extremity kinesiology.A hybrid transfemoral prosthetic(HTP)mechanism with multigait functions is proposed to recover the gait functions of TAs.The kinematic and mechanical performances of the designed parallel mechanism are analyzed to verify their feasibility in transfemoral prosthetic mechanism.Inspired by motion-energy coupling relationship of the knee,a wearable energy-damper clutched device that can provide energy in knee stance flexion to facilitate the leg off from the ground and can impede the leg’s swing velocity for the next stance phase is proposed.Its co-operation with the springs in the prismatic pairs enables the prosthetic mechanism to have the energy recycling ability under the gait rhythm of the knee joint.Results demonstrate that the designed HTP mechanism can replace the motion functions of the knee and ankle to realize its multimode gait and effectively decrease the peak power of actuators from 94.74 to 137.05 W while maintaining a good mechanical adaptive stability.

关 键 词：hybrid transfemoral prosthetic mechanism energy recycling wearable mechanical clutched device mechanical adaptive stability 

分 类 号：R318.17[医药卫生—生物医学工程]