Simulation research for quarter vehicle ABS on complex surface based on PID control

摘要

The braking dynamics model of quarter vehicle ABS is established. In order to consummate simulation content of vehicle Anti-lock Brake System on all road surfaces, this research analyses various road surfaces on the brake working conditions in allusion to the adhesion coefficient of road surface. The PID control algorithm of vehicle braking with slip rate as the control object is presented on complex surface based on PID control theory. Simulation model of quarter vehicle, complex surface model, PID control strategy model and simulation model of complex surface are established by the MATLAB/Simulink. The simulation tests of complex surface are designed to obtain curve change of vehicle speed and wheel velocity on different adhesion coefficient surface with single wheel vehicle. The graph proves that the PID control reduces concussion error of slip rate at 9.45%–22.55%. Curtailment rate of braking distance is 6.30%. Curtailment rate of braking time is 9.69%. Curtailment rate of saltation wheel velocity is 12.76%. Curtailment rate of saltation slip rate is 6.77%. Slip rate is changing in the best predetemine range. The working reliability is proved on complex surface by ABS PID control. The results show that the PID control system can improve braking efficiency.