Abstract
Each year hundreds and thousands of human lost their lower limbs for accident, disease, war and so on. Wearing transfemoral prostheses is the only way return to society. The inability to deliver joint power significantly impairs the ability of these prostheses to restore many locomotive functions. A novel and smart Active Transfemoral Prosthesis is designed for transfemoral amputees. Using Vicon MX system captures amputees' gait data and analyses the angle of healthy limb and prosthetic side. Base on the function and principle of huaman lower limb, Active transfemoral prosthesis is designed. Virtual prototype of active transfemoral prosthesis 3D model is built. The active above knee prosthesis uses linear motor as actuator. The structure of prosthesis knee joint is four bar linkage which can significantly keeping well with the being's Instant Center of Rotation. The gait signals of healthy subjects are used as input signal. Hopf oscillator is used to construct a central pattern generator (CPG), which makes up the dynamical system.
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