Simulation analysis of automobile ABS based on Simulink
                                                               ZHAO Yaosen, ZHU Yong, XU Xiaodong
              (School of Electromechanics and Automobile Engineering, Chongqing Jiaotong University, Chongqing 400074, China)

Abstract: Aiming at the problem that whether the good handling ability and braking ability could be guaranteed when the vehicle is braked under the condition of whether there is ABS or not, the dynamic analysis of the single wheel vehicle model was carried out, and the mathematical formula of the vehicle dynamics was obtained. Then the mathematical simulation model of the single wheel vehicle model was built by using Simulink. After that, the model of automobile tire based on magic formula, brake system model, slip rate model and the mathematical formula of PID control model were analyzed, and the related simulation model was built. Finally, each module was combined into a complete vehicle ABS simulation model, and the braking condition of automobile with or without ABS was compared. The results indicate that the established ABS system model is reliable, and has good handling stability and braking performance during the whole automobile braking process.

Key words: antilock brake system（ABS）; simulation; PID; slip rate