基于逻辑门限值的爆胎车辆制动仿真研究

Simulation Research on Braking of Tire Burst Vehicle Based on Logic Threshold

为研究汽车防抱死制动系统(ABS)在爆胎工况下的有效性,基于逻辑门限值控制设计了ABS控制系统,结合动力学软件CarSim与Simulink设计控制系统,以轮胎滑移率为控制对象,以纵向制动距离和横向偏移量为衡量标准,对正常驾驶和爆胎工况下的汽车采用不同的制动方式进行仿真研究。结果表明,在汽车正常行驶和爆胎工况下,逻辑门限值ABS控制器都能起到实时的制动效果,但不同的制动策略有着较为明显的差别;爆胎工况下,汽车的纵向制动距离较正常行驶的汽车有所延长,此时前左、右侧控制策略中的四轮独立控制策略的轮胎没有出现抱死现象,制动效果最佳。

In order to study the effectiveness of anti lock braking system(ABS)under tire burst condition,an ABS control system is designed based on logic threshold control.Combined with the dynamics software CarSim and Simulink,the control system is designed.The tire slip rate is taken as the control object,and the longitudinal braking distance and transverse offset are taken as the measurement standards.The simulation research is carried out on the vehicle under normal driving and tire burst condition using different braking modes.The results show that the logic threshold ABS controller can achieve real-time braking effect under normal driving and tire burst conditions,but different braking strategies have obvious differences.Under tire burst condition,the longitudinal braking distance of the vehicle is longer than that of the normal driving vehicle.At this time,the four wheel independent control strategy tires in the front left and right control strategies do not appear lock up phenomenon,and the braking effect is the best.