电控空气悬架车辆自适应前照灯控制策略研究

Research on Control Strategy of an Adaptive Front-Light System of Vehicles with Electronically-Controlled Air Suspensions

为有效提高前照灯夜间照明效果,本文在充分考虑国标GB7258《机动车运行安全技术条件》基础上,根据车身高度、车速等信号变化,提出一种自适应前照灯系统(adaptive front-light system,AFS)的新型前照灯垂向控制策略,以合理调节其夜间照射角度。同时,采用Matlab/Simulink和Stateflow软件,建立前照灯垂向控制策略模型,并对车辆在加速工况和减速工况条件下进行仿真分析。仿真结果表明,在车辆高度变化及车辆加速情况下,所提出的控制策略模型可有效调节前照灯照射角度,提高驾乘安全性;在车辆高度变化及减速条件下,所提出的控制策略模型亦可实时有效地调节前照灯照射角度,改善驾乘人员夜间行驶安全性。该研究可有效提高电控空气悬架系统车辆夜间行车安全性。

In order to improve ride comfort,fuel economy and trafficability,the electronic controlled air suspension vehicle must charge and deflate the air spring,but this will cause a significant change in the headlamp irradiation angle.If the irradiation angle is not adjusted reasonably,it will inevitably reduce the night driving safety.In order to improve the night lighting effect of headlamp,a vertical adjustment control strategy of headlamp illumination angle of adaptive headlamp system(AFS)is proposed based on the technical requirements of the national standard GB7258"Technical Conditions for Safety of Motor Vehicle Operation",and the signal changes of body height and speed,to reasonably adjust the illumination angle of headlamp.The control strategy model is established by using MATLAB/Simulink and Stateflow,and simulation is taken.The simulation results show that the proposed control strategy can improve the night driving safety of the vehicle with electronic air suspension system.