The Study On Handling Stability Of A Full Vehicle Based On VP Technology

As a new industry technology, virtual prototyping (VP) technology has been used in many fields and shown great technical advantages and economic benefits. The modeling and simulation of vehicle based on VP is an essential step for the system design in the future. The multi-body dynamics vehicle model of a MPV (Multi-purpose vehicle) using ADAMS software was established, which contains body, suspensions, steering system, tires and stabilizing bars etc. A large amount of simulations had been carried out under ADAMS virtual environmental modes. In order to validate the vehicle model, the simulation results were compared with physical experiments. The results show that the vehicle with the initial suspension parameter, the handling stability is better than that when the parameters are adjusted. The simulation results provide important reference for evaluating, improving, optimizing the same type of vehicles.Electric power steering system (EPS) is more appropriate to realize an ideal steering than a conventional hydraulic power steering system. Building up the whole vehicle model in the software of ADAMS and the control system of EPS in the environment of MATLAB, adopting the PID control method, which suits the steering system with non-linear characteristics. The EPS and the vehicle model were implemented together by using MATLAB and ADAMS software. In co-simulation, each software package uses its own solvers to provide a solution for its respective model. In the system, the state variables are set up in order to realize the data exchanging. Under different condition, the co-simulation were carried out by using PID control scheme. The results prove the method based on MATLAB and ADAMS is correct.