主从式结构的车辆自适应前照灯控制系统设计

车辆自适应前照灯系统(Adaptive Front-lighting System,AFS)是车辆的一种主动安全系统.本文开发的AFS采用主控模块加电机驱动辅助模块组成的主从式结构.AFS主控模块用于采集车身悬架高度、方向盘转角、GPS等传感器信号,用于进行水平和垂直两个方向的车灯角度计算,并发送控制指令信号给步进电机;电机驱动辅助模块用于接收主控模块发出的控制指令信号,并驱动步进电机运动,实现车灯随动转向.现已开发出整套软件算法和硬件原理样机.实验结果表明,该系统能够实现弯道随动转向和坡道俯仰调节,完成不同速度下光型模式的配置.

Vehicle Adaptive Front-lighting Control System of Master-slave Structure

Vehicle Adaptive Front-lighting System(AFS) is an active safety system.In the paper,the AFS is constructed by a master-slaver structure,which is consisted by a AFS master module and a motor driven slaver module.At first,the AFS master module is used to collect the signals of the suspension height sensor,the steering wheel angle and the GPS sensor signals,in order to calculate the light angle of horizontal and vertical directions,and then transfers the command signals to stepping motors.Then,the stepping motor is used to receive the control command signals from the main control module,and drives a stepper motor movement to realize the headlights servo steering.Finally,a software algorithm and a hardware prototype are developed.The experiment results demonstrate that the system can realize the adaptive front-lighting turning according to the curved lane and pitch adjusting according to road slope,and it can achieve the management of lighting patterns according to different velocities.