基于逻辑门限控制的汽车ABS仿真分析

为了提高制动稳定性,结合汽车ABS控制原理在MATLAB/Simulink环境下采用逻辑门限控制方式建立ABS液压控制模型,以车轮滑动率和车轮角速度作为逻辑门限参数,设定门限值,通过液压调节装置实时控制制动力的大小,防止制动时车轮抱死拖滑。为验证设计效果,同时搭建未装ABS系统的单轮汽车控制模型,在相同制动条件下进行仿真分析。结果表明:采用逻辑门限控制方式的汽车模型具有较好的实时性,制动时ABS系统可以使车轮滑动率一直维持在20%左右;与未装ABS系统的单轮汽车模型相比,制动距离缩短了13.02%。

Simulation Analysis of Automobile ABS Based on Logic Threshold Control

In order to improve the braking stability, the hydraulic control model of automobile ABS is established by using the logic threshold control method under the MATLAB/Simulink environment in combination with the ABS control principle. Take the wheel slip rate and wheel angular speed as the logic threshold parameters, the threshold value is set, and the size of the braking force is controlled in real time through the hydraulic adjustment device, so as to prevent the wheel from locking and dragging during braking. In order to verify the design effect, a single wheel vehicle control model without ABS system is built and simulated under the same braking conditions. The results show that the vehicle model with logic threshold control has better real-time performance. The ABS system can keep the wheel slip rate at around 20% during braking. Compared with the single wheel vehicle model without ABS system, the braking distance is shortened by 13. 02%.