基于模糊控制方法的防抱控制系统的研究

A Study on Anti-lock Brake System Based on Fuzzy Control

本文采用模糊控制方法对车辆防抱制动系统进行了模拟研究,采用单轮的车辆模拟模型,用两种控制方法研究了防抱系统,即基于车轮滑移率的连续控制系统和基于车轮加减速度及参考滑移率的非连续控制系统。在连续控制系统中采用带有双修正因子的控制算法并与PID算法进行了模拟比较。在非连续控制系统中,以车轮加减速度和参考滑移率为模糊量,防抱状态作为控制输出量,利用逻辑门限控制方法提出合理的控制规则,将逻辑门限与模糊控制有机地结合,构成有效的防抱控制。模糊模拟结果表明:基于模糊控制的防抱控制系统鲁棒性强,控制效果好,可实施性好。

In this paper, fuzzy control method for anti-lock brake system(ABS) is studied. A single wheel vehicle model is used for simulation on with two methods:wheel slip ratio control based on continuous system, and wheel acceleration threshold control based on non-continuous system. In the continuous system, a fuzzy control with two modified factors is compared with PID control. In the non-continuous system, the acceleration and reference slip of wheel is taken as fuzzy variable and ABS status as an output variable. A reasonable control rule is proposed based on threshold control method. Combined with fuzzy method, an effective ABS control is constructed. The simulation results show that the ABS with fuzzy control is robust, has good control effectiveness and easy to implement.