The Four Turned To Modeling And Simulation And Experimental Study Of The Test Platform

Four-wheel steering plays an important role in improving the stability of the vehicle manipulation. The work principle and the construction of the four-wheel steering system (4WS) are studied in this paper. The driving scheme and hydraulic principle of the 4WS test plat are defined. The paper analyzes the kinetics of the test plat under three kind of moving mode. Based on the analyses, the paper introduces the PID control and fuzzy control to the hardware controller. The paper models the whole mathematic model of the test plat, simulates the model by the Matlab software and finishes the dynamic characteristics analyses of the plat. The analyzing results indicate that the speediness, precision and stability cf the plat are satisfied. This paper carries out the field experiment, and gets the experiment transform function by polyfitting the data. The experiment data is consist ng to the simulation results. The consistency shows that the mathematic model is right, and the choice of both the hardware controller and the control strategy is reasonable. At the same time, it indicates that the plat have a good steering performance. The study of the 4WS test plat lays the foundation for developing the controller of the vehicle of the 4WS further.