汽车ABS虚拟样机仿真与制动性能的研究

对汽车ABS制动系统进行了虚拟样机仿真研究.采用滑移率为控制参数,应用MATLAB与ADAMS联合仿真,实现了ABS的实时控制功能.在同一虚拟样机模型的基础上,进行了车速与制动距离的仿真,结果表明,汽车制动前的速度与制动距离呈二次函数关系.讨论了三、四控制通道控制对汽车的制动方向稳定性和制动距离的影响:紧急制动时,四通道独立进行制动压力控制的ABS系统可获得最短的制动距离,而三通道前轮独立控制后轮低选控制的ABS系统制动距离相对来说要大;但在不对称路面上紧急制动时,三通道控制的汽车偏转力矩较小,方向稳定性更好.

Simulation of Virtual Prototype of ABS Braking System and Braking Performance

Simulation of ABS braking system was carried out with its virtual prototype the way the slip coefficient was taken as control parameter and the real-time control function of ABS was realized by the joint simulation through MATLAB and ADAMS.The simulation of velocity and braking distance is realized on the same virtual prototype model,and the result showed a quadratic functional relationship between(car's) velocity before braking action and braking distance.Discusses the impact of the ABS with 3 and 4 control channels on the directional stability during braking and braking distance.It was revealed that when emergency braking the braking distance is shortest if the 4-channel ABS works independently,while the distance becomes longer if the 3-channel ABS works independently.However,the deflection torque to a car is smaller with better directional stability when the car is traveling on an asymmetric road and in emergency brake application with a 3-channel ABS.