Fuzzy PID Control of the Integrated System of Electromagnetic Brake and Friction Brake of Car

Abstract

The integrated system of electromagnetic brake and frictional brake of car can improve braking performance effectively. Reasonable control strategy is the key of the integrated brake system. In this paper, it is analyzed and compared to the fuzzy control, PID control and fuzzy PID control. Based on that, fuzzy PID control is used to control the amount of current flowing in the electromagnetic brake coil by considering the nonlinear and time-varying of the integrated system of electromagnetic brake and frictional brake of car. The vehicle slip ratio deviation and rate of the slip rate deviation are used as the input. The electromagnetic brake coil current is used as the output. Thus, the fuzzy PID controller of the system is designed. A car equipped with the integrated system of electromagnetic and frictional brake is taken as an example. Matlab/Simulink software is utilized to carry out simulation analysis of the system. It is analyzed and compared the simulation output current curves of three control methods, braking time and braking distance. The simulation result shows that the integrated brake system using fuzzy PID strategy can effectively reduce braking time and shorten braking distance.