Control strategy study on active suspension and four wheel steering integrated control system of vehicle

摘要

By building up the virtual prototype model of some vehicle, simplifies are done and the dynamic mathematic model is extracted. The contrastive simulation study indicates that the results are consistent with each other. Based on the mathematical model, different kinds of controller are designed. Firstly, the variable domain fuzzy active suspension control method is introduced. Secondly, the four wheel steering control strategy is designed. Lastly, the anti-roll bar active control and the integrated control tactics are brought forward. Combined with the virtual prototype model, some simulation tests are done. For example, cornering on flat road and uneven road, and the disturbance by sidewind are simulated. From the results, it can be concluded that the integrated control vehicle system improves the handling and riding performance, and also improves the robust performance greatly.