The Motion Simulation of Human Lower Extremity Based on Dynamics

Based on the knowledge of Human Anatomy and the multi-body dynamics, a simplified model of the human lower extremity is firstly established using the ADAMS in this paper. In process of modeling for lower extremity, the lower extremity is simplified as thighbone and shankbone joined by knee joint for the patella is very small. There is anther assumption that the femur and tibia are simulated as cylindrical rigid body for their shape, which is similar to cylinder. Then, the motion of flexion-extension and medial or lateral rotation of Human's thigh and lower leg's flexion-extension motion is simulated in this paper. In addition, the muscles which are related to the flexion-extension motion are added to the model in the form of point-point force. Lastly, several general movements of muscles-bones of human lower extremity are simulated for researching the principles of force and torque of every joint in process of movement using the kinematics and dynamics analysis function of ADAMS. The results of the simulation are analyzed as well in this paper.