Total hip arthroplasty (THA) is performed to replace all or part of the hip joint with an artificial joint for patients who have rheumatoid arthritis or osteoarthritis of the hip joint. In this paper, we propose a hip joint motion simulator for the analysis of dislocation and wear of the artificial hip joint. A DC servo motor and six linear actuators (parallel mechanism) have used to construct the simulator that can generate the desired joint angles and contact forces for the daily life motion. The input signals for the simulator are collected by using human motion analysis based on 3 dimensional musculo-skeletal model and motion capture system.
