The Research On 3-D Dynamic Simulation Of Commercial Vehicle EPS

Electric Power Steering System (EPS) is a new type of automobile steering system developed recently, which has the advantages of saving fuel, reducing overall weight, improving driving security and producing less pollutions. EPS is taking the place of HPS gradually and becoming one of the hotspots in the research of automobile technology in the world.In this thesis, based on the classic theory of multi-body system dynamics,a 3-D dynamic model of a commercial vehicles is established under the ADAMS/Car--the most advanced mechanical system simulation software.which includes the front/rear suspension, steering system and front/rear wheel. A EPS simulation is also launched.and use SAE 3 beams models the leaf spring as model-flex-body. The basic parameters of EPS assist characteristic are analyzed. Combined with the virtual prototype, a type of automobile assist curves is posed.simulated and analyzed vehicle handling and stability. The simulation results prove the notable effect of EPS in improving the steering portability and road feeling.