基于最小二乘支持向量机的防抱死制动控制方法

以车轮参考滑移率和角加速度作为输入向量,以制动轮缸的制动压力作为输出向量,设计了基于最小二乘支持向量机(LS-SVM)的汽车防抱死制动系统(ABS)控制器,利用支持向量对控制器进行训练得到控制器的参数.设计了包括输入层、控制层和输出层的汽车防抱死控制系统,系统以各轮的速度作为输入向量,经过控制层的运算得到各轮的制动压力,然后采用PwM(pulsewidth modulation)方法控制轮缸压力,进而实现防抱死控制.搭建了汽车ABS测控系统,参照国际标准,在不同条件下进行道路试验.试验结果表明,基于LS-SVM的汽车防抱死制动控制方法具有良好的制动平稳性和自适应性,是一种有效的新的ABS控制方法.

Automobile anti lock braking system control based on a least squares support vector machine

Using the referenced slip rate and angle acceleration of the wheel as input vectors and the braking pressure as an output vector,an automobile anti-lock braking system(ABS) controller based on a least squares support vector machine(LS-SVM) was designed.Training the LS-SVM controller using the supporting vector,the parameter of the controller was calculated.An anti-lock braking system was designed that includes an input layer,a control layer,and an output layer.Using wheel speed as an input,the braking pressure of each wheel was calculated.The pulse width modulation(PWM) method was used to control the braking pressure,and thereby to bring ABS control.An automotive ABS test and control system was constructed.Road tests under different conditions were completed according to international standards.Test results show that an anti-lock braking control method based on LS-SVM has good braking stability and adaptability.It is an effective new ABS control method.