Abstract
This paper presents protective control system design for occupant lower extremities in vehicle frontal collision by using system identification model. The protective control system consists of active knee bolsters. The control problem is formulated as reducing the load to the femurs while restraining the occupant forward motion. The active knee bolster force is calculated to minimize the maximum load to the femurs. Numerical simulations show the load to the femurs is reduced. Finally the protective control system with the active knee bolster is verified by using three-dimensional multi body simulator.
