基于MATLAB的汽车ABS制动过程仿真

Simulation of automotive ABS braking process based on MATLAB

汽车上安装的ABS关系到汽车行驶制动过程中的稳定性和驾驶员的安全,所以对于ABS的研究至关重要。根据某车型建立了单轮系统模型和轮胎附着系数模型,第一,应用MATLAB在制动减压、增压和保压过程中进行:滑移率、车轮中心速度、线速度、地面制动力和制动力矩等参数的变化过程仿真;第二,仿真出不同质心位置对防抱制动系统的影响。由仿真图像可以清晰的看出每一个参数的变化过程,便于对今后ABS的改进有更好的理论依据,并且可知,当质心的位置由后向前变大时,可以使制动时间缩短,确保行车的安全。

ABS is related to the stability of car braking and the safety of the driver. In this paper, a single wheel systemmodel and a tire adhesion coefficient model are established based on a vehicle model. First, through the application ofMATLAB, simulation of the changing process of such parameters as center of wheel slip, wheel speed, line speed, ground- braking force and braking torque are carried under the conditions of decompress, pressure boost and pressure maintainingof braking. Second, the effect of different location of the centre of mass on the anti - lock braking system is explored throughsimulation. The whole changing process of every parameter can be seen clearly through the simulation image, which facili-tates the improvement of ABS theoretically. It is also found that when the position of the centre of mass changes bigger whenmoving from rear to forepart, braking time can be shortened, which ensures traffic safety.