Kinetostatic analysis of knee joint using mbs simulation

Abstract

The paper presents the kinetostatic analysis of the right and left knee joints using a multibody system that replicates the human body lower limbs. The model is
developed in MSC Adams and it composed of 7 kinematic elements (pelvis, right and left femur, right and left tibia and right and left foot) interconnected through 6 spherical joints constrained to 1 degree of freedom each (DOF). To simulate the MBS system we have developed laws of motion for 6 major joints composing the human lower limbs structure (right and left hip, right and left knee and right and left ankle). The laws of motion were determined based on kinematic data generated by a depth camera. Thus, determining the MBS model kinematics we were able to conduct the kinetostatic analysis using the inverse dyamic analysis principles. The MBS system was simulated during bipedal cycle walk of 2 steps in 3 loading cases: normal weight (43.38 Kg), with an additional weight of 34.46% equivalent of 146.599 N and with an additional weight of 64.93% equivalent of 276.233 N. The kinetostatic analysis has provided the ground reaction forces variation with respect to time for left and right knee joints (LKJ, RKJ) in the 3 loading cases.