Simulation Analysis of Handling Stability of Four-wheel Steering Vehicle

The steering characteristics of four-wheel steering vehicle are studied,and the simulation of four-wheel steering vehicle with certain control is done.Based on an established dynamic model of four-wheel steering vehicle,the difference between the steady state and transient responses of four-wheel steering vehicle and those of front wheel steering vehicle is studied,and the state equation of space and the transfer function about yaw velocity and lateral acceleration to the front wheel steering angle are obtained.The effect of transfer function's zero and pole position on response between four-wheel steering vehicle and front wheel steering vehicle is described.Simulation of four-wheel steering vehicle in Matlab/Simulink software environment matches with theoretical analysis.The advantages of four-wheel steering vehicle compared with front wheel steering vehicle are showed.The conclusion is useful for the system design of four-wheel steering vehicle.