Simulation of vehicle and power steering dynamics using tire model parameters matched to whole vehicle experimental results

This paper uses simulation to investigate how vehicle loading conditions dr iver only, passengers,. cargo, and fuel affect power steering system and ov erall vehicle dynamics. Our purpose of the study was to evaluate the power steering system model for possible use in the National Advanced Driving Sim ulator (NADS). The effects of changing loading conditions on inertial prope rties of passenger cars have been found experimentally using a Vehicle Iner tia Measurement Facility (VIMF). This paper presents simulation results usi ng a vehicle handling model combined with a power steering system model and a nonlinear tire model. A crucial part of this project was the adjustment of certain parameters of Pacejka's tire model in order to match simulation results with experimental measurements of vehicle and power steering variab les in transient maneuvers.