基于轮胎侧偏特性的汽车自适应前照灯转角修正方法及跟随效果研究

Research on Following Result and Correction Method of the Angle of Vehicle Adaptive Front-lighting System based on Tire Cornering Property

由于汽车前照灯转角和汽车的运动状态有关,而汽车的运动状态又受轮胎侧偏特性的影响,因此本文利用前后轮侧偏角的绝对值之差来修正前照灯理论转角;然后,在Simulink中建立步进电机仿真模型,在ADAMS中建立前照灯减速机构虚拟样机模型,再通过两者组合成前照灯转角开环控制系统。把前照灯理论转角输给该开环控制系统,通过MATLAB/Simulink和ADAMS的之间的软件通信接口,实现了2个软件的联合仿真,得出了前照灯的实际输出转角对需求理论转角的跟随曲线。

The angle of adaptive front lighting system is relevant to the motion state of the vehicle, however, the motion state of the vehicle is affected by the tire cornering property. Therefore, the paper amend the headlamp theory angle by the difference between values of the side slip angles of the front and rear wheels. And then, build a simulation model of stepper motor in Simulink software and a virtual prototype model of AFS in ADAMS software. After that, we combined the two models with a headlamp angle open-loop control system and imported the headlamp theory angle into the system. Through the software communication interface between MATLAB/Simulink and ADAMS, we have realized the co-simulation between them. And finally we got the following result between the actual output angle and the theory angle of the headlamp.