Concurrent Simulation of EPS Control System and A Full Vehicle Dynamic System

摘要

Electric Power Steering (EPS) mechanism has become widely equipped in passenger vehicle due to the environmental consciousness and higher fuel efficiency. This paper describes the development of concurrent simulation technique and simulation integration technique of EPS control system with dynamic vehicle system. A full vehicle model interacted with EPS control algorithm was concurrently simulated on a single bump road condition. Dynamic responses of vehicle chassis and steering system resulting from road surface impact were evaluated and compared with proving ground experimental data. The comparisons show reasonable agreement on tie-rod load, rack displacement, steering wheel torque and tire center acceleration. This developed simulation capability was used for EPS performance evaluation and calibration as well as for vehicle handling performance integration and synthesis.