面向配光特性的汽车AFS动态转角数学模型研究

摘要

针对常用的汽车自适应前照灯（AFS）转角数学模型存在的问题，对汽车车身侧倾角与转弯半径及车速之间关系进行研究，建立面向配光特性的汽车AFS动态转角数学模型，通过AFS的二维转动对侧倾后AFS照射方向进行修正。结果表明，与常用的AFS转角数学模型相比，AFS动态转角数学模型求得的前照灯转角在yz平面上补偿角αx(t)最大达0.7°，占yz平面上设计旋转角度的28%，解决了侧倾后常用的AFS配光特性难以达到国家标准GB4599-2007要求的问题。%To solve the deficiencies existing in the commonly used AFS mathematical model, we analyze the relationship between the body roll angle, turning radius and vehicle speed,and build the mathematical model of dynamic bending mode of vehicle adaptive front-lighting system for light distribution property, and revise the lighting direction of AFS after side roll by AFS 2D turning. The results show that, compared with commonly used mathematical model of AFS, the turning angle of headlamp obtained with mathematical model of AFS dynamic bending mode has a offset angle αx(t) of up to 0.7° on plane yz , which accounts for 28%of the designed rotation angle on plane , which enables the AFS light distribution property commonly used in side roll to comply with requirement of GB4599-2007.