汽车ACC系统纵向控制六模式切换策略仿真研究

Simulation Test of a New Six-mode Switching Controller for Enhanced Adapt Cruise Control

为了增强现有六模式汽车自适应巡航(ACC)系统全工况下的适应性,文中综合考虑了2车相对速度、相对距离和本车速度等参数对ACC系统控制策略的影响,提出了1种六模式ACC系统控制模式的划分方法,并定量地确定了控制模式划分的边界条件。为了使ACC系统能够根据车辆行驶工况做出合理的响应,分别设计了各控制模式的加速度算法。将模式划分方法及控制策略建立相应的Simulink模型,考虑到PreScan具有场景建立便利性和可视化等优点,采用PreScan仿真场景并通过CarSim车辆动态模型,对所设计的六模式ACC系统进行了仿真试验。仿真结果表明:提出的六模式ACC系统,在全工况特别是前车切入等复杂工况下,较现有的六模式ACC系统表现出更好的适应性。

In order to enhance the adaptability of existing six-mode Adapt Cruise Control（ACC）system under all conditions,this paper considers the effects of several vehicle operation parameters,such as relative velocity,relative distance and velocity,on the ACC system controlling strategy,and then proposes a new six-mode ACC system.The proposed controller has a new classification scheme,where the classification boundary of each mode is quantified.In order to ensure the ACC system to respond reasonably according to the vehicle operation status,the control algorithm of acceleration rate of each mode is designed.Finally,the Simulink models for the proposed classification scheme and control method are developed.In addition,the vehicle dynamic models are developed in CarSim simulation scenarios are created in PreScan in order to visually study the effectiveness of the proposed controller.The simulation results show that the proposed six-mode ACC system is able to respond correctly in all conditions especially under complicated traffic scenarios.