摘要
为解决汽车AFS启动条件和控制算法存在的问题,通过分析汽车前照灯二自由度动力学模型,得到了汽车前照灯偏转角度计算公式.根据分析2种不同的车灯等照度包络曲线得到了汽车AFS启动条件控制模型,并对其控制算法进行了研究,推导出了改进遗传算法的相关参数.并在MATLAB/Simulink平台创建AFS建模进行仿真分析.仿真结果表明,改进后的控制算法能有效地控制超调量且能提高AFS开启时刻控制的准确度.
In order to solve the problems existing in the automotive AFS starting condition and control algorithm, the calculating formula of the vehicle headlight adjusting angle can be obtained by analy- zing the two-freedom vehicle dynamic model. According to the analysis of the two different illumina- tion envelope curves of the car lights, the AFS staring condition control model is obtained and its con trol algorithm is studied deeply. In addition, the related parameters of the improved genetic algorithm are deduced. Besides, simulations are performed by building AFS model in the MATLAB/Simulink platform. The sirnulation results show that the improved control algorithm can effectively control the overshoot and accurately determine the time of AFS start, which has important significance to the im provement of the safety of night driving.
出处
《武汉理工大学学报（交通科学与工程版）》
2016年第4期646-650,656,共6页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
