汽车防追尾预警系统安全距离数学模型

Study on the Mathematics Model for the Forewarning System of Automobile Rear-end Collision Avoidance

分析了汽车防追尾预警系统的设计要求,在常用安全距离算法基础上,结合汽车制动过程的运动学分析,建立了一种改进后的安全距离数学模型。在设定的道路交通模式下,分析了预警度概念下的控制策略。仿真结果表明,该模型能适用于多种不同道路交通状况,运行中的自车系统能通过实时判断车辆当前状态下的危险度,发出不同等级的预警。

Rear - end collision is a common traffic accidents, and it＇s an important aspect of vehicle active safety research. An improved mathematics model was set up in light of the analysis of the rear - end forewarning system design requirements and the actual kinematical analysis of braking process. The control strategy in the concept of forewarning degree with the setting of road traffic pattern was analyzed. Simulation results show that the model could be applied to variety traffic conditions through the setting of road traffic patterns, and it would give judgment of forewarning grade by collecting the real - time status of both vehicles.