Analytical Study of Hip Sliding Mechanisms in Seating Using a Human FE Model

This paper describes hip sliding mechanisms for seating comfort evaluation using a human FE model (THUMS). From a rigid seat experiment, combined with THUMS simulation, it was first found that the backward moment around the hip centre of gravity induced by the hip seat reaction force on pelvis was the main cause of hip sliding. A hip sliding equation was then constructed considering seat characteristics, namely hip seat cushion angle and hip seat reaction force, as parameters. Finally, a validation of this equation was conducted asking test subjects to seat in prototype automotive seats.