Mechanism and dynamics of active and passive knee joint of Above knee prosthesis

This paper introduces a kind of knee joint mechanism of Above knee prosthesis based on active and passive mode. The active and passive mode is transferred by using unilateral overrunning coupler. The stress and strain analysis of the dangerous position parts were made in this paper. The dynamics analysis of the knee joint mechanism is made by using the MATLAB software. The parameter auto-adjustment PI regulator is introduced, and The simulation results is given too.