模糊PID控制的汽车牵引力系统仿真研究

汽车在低附着系数路面加速、起步或爬坡时，驱动轮极易发生过度滑转从而使汽车失去稳定性，汽车牵引力控制系统将驱动轮的滑转率控制在最佳的范围。建立了四轮驱动汽车的动力学模型，以驱动轮的滑转率为控制目标，采用基于模糊PID控制的汽车牵引力控制的算法，设计了以制动阀占空比为控制对象，从而达到调节轮缸制动压力的目的，在MatLab／Simulink仿真环境下，对车辆在均一和分离两种路面上进行了仿真，对比仿真结果，表明模糊PID控制具有响应速度快、稳态性能好的特点。

Simulation of Vehicle Traction System on Fuzzy PID Control

When the vehicle accelerates, starts or climbs on a low adhesion coefficient road, driving wheels occur to excessively slip easily, so that the stability of vehicle is lost, automotive traction control system can limit the driving wheel slipping rate within the best range. A dynamic model of four-wheel driving vehicle was established and the driving wheel slipping rate was recognized as the control target. Based on fuzzy-PID control , vehicle traction controlling algorithm was adopted. The duty cycle of brake valve is designed as the controlling target, achieving to adjust the pressure of brake cylinder. In the simulation environment of MatLab/Simulink, the vehicle was simulated at homogenous and separating road separately. Compared to the results, show that the fuzzy PID control has response speed and good steady-state performance characteristics.