基于Simulink的汽车ABS仿真分析

Simulation analysis of automobile ABS based on Simulink

针对汽车在有无ABS情况下制动能否保证良好的稳定和制动性的问题,对汽车整个ABS系统模型进行了仿真研究。对单轮车辆模型进行了动力学分析,得出了其车辆动力学数学公式,然后利用Simulink搭建了单轮车辆模型的数学仿真模型;依次分析了基于魔术公式的汽车轮胎模型、制动系统模型、滑移率模型以及PID控制模型的数学公式,搭建了相关仿真模型;最后将各个模块组合成了一个完整的汽车ABS仿真模型,并对有无ABS下的汽车制动工况进行了对比。研究结果表明:所建立的ABS系统模型可靠,在制动过程中具有良好的稳定和制动性。

Aiming at the problem that whether the good handling ability and braking ability could be guaranteed when the vehicle is braked under the condition of whether there is ABS or not,the dynamic analysis of the single wheel vehicle model was carried out,and the mathematical formula of the vehicle dynamics was obtained. Then the mathematical simulation model of the single wheel vehicle model was built by using Simulink. After that,the model of automobile tire based on magic formula,brake system model,slip rate model and the mathematical formula of PID control model were analyzed,and the related simulation model was built. Finally,each module was combined into a complete vehicle ABS simulation model,and the braking condition of automobile with or without ABS was compared. The results indicate that the established ABS system model is reliable,and has good handling stability and braking performance during the whole automobile braking process.