摘要
以用于轮毂电机驱动电动汽车的ABS控制逻辑为研究对象,通过SPSS软件设计了正交试验,并用L9(33)正交表对门限值进行了方差分析,得到了车轮转动惯量增加对门限值设置的影响规律,同时确定了最佳门限。基于MATLAB/Simulink搭建了7自由度整车模型,分析了车轮转动惯量增加对ABS控制效果的影响。仿真结果表明,在路面附着系数为0.85、制动初速度为90 km/h的条件下,利用提出的分析方法调整门限值后,制动距离最大缩短了5 m,制动时间减少了0.15 s,ABS控制效果显著提升。
Taking the control logic for ABS of In-Wheel-Motor(IWM) electric vehicle as the research object, the orthogonal experiment is designed by SPSS software, and the variance is analyzed by L9(33) orthogonal table. The law of influence of the increase of wheel inertia on the threshold setting is obtained and the optimal threshold was determined.Based on MATLAB/Simulink, a seven-degree-of-freedom vehicle model is built. The influence of the increase of wheel moment of inertia on the control effect of ABS is analyzed. The results of simulation show that, with road adhesion coefficient of 0.85 and initial braking speed of 90 km/h, after threshold is adjusted with the proposed analysis method, the braking distance is shortened by 5 m, the braking time is reduced by 0.15 s, and ABS control effect is significantly improved.
引文
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