Advanced Tire Modeling Method Study For Virtual Proving Ground

With the development of economy,automobiles became one of the most important transportation methods.Therefore,the safety,durability and NVH also became important index that customers and manufacturers care about.Tires,one of the most import components that pass forces from ground to the body of a car,influence that all.Choosing a set of proper tires and specifying a efficient matching method is necessary.Matching test is expensive and coats a lot of time,so Virtual Proving Ground catches more and more attention.Traditional simplified tire models could not satisfy the needs of simulation of VPG,so we need more accurate tire model.Ftire model could be one of the best choices.This article identified the Ftire model parameters using tire drum test and force and moment data based on least square method according to the theory and parameter document of Ftire,and authored a software to identify the parameters automatically using Matlab language,making the process more efficient.Suspension connects wheel and car body,so building a accurate suspension model is also important.This article compared and analyzed the construction of shock absorber of passive suspension and semi-active suspension,got the indicator diagram and external characteristic curve,then built a model of the shock absorber using BP neural network method.Then a 1/4 car model based on the former shock absorber and Simulink software was built to simulate the sky-hooked control method algorithm.The accuracy of the controller model was proved by bench test.VPG including control system was set up based on the Ftire model,absorber model,suspension model,road model and car model in ADAMS software.Then tires matching simulation and parameter optimization of controller simulation were tested,proving that VPG is a possible way to improve NVH characteristics of automobile.