实时工况下线控制动自动紧急控制策略研究  

Research on the automatic emergency control strategy of Brake⁃by⁃Wire under real⁃time operating conditions

作　　者：姚明[1] 李建军 彭靖尧 YAO Ming;LI Jianjun;PENG Jingyao(School of Automotive and Traffic Engineering of JiangSu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《电子设计工程》2023年第9期78-83,共6页Electronic Design Engineering

摘　　要：针对车辆紧急制动控制策略准确性不足的问题,对线控制动减速度的响应特性进行研究,提出实时工况下的分级避撞控制策略。基于GPS坡度估算和Brush轮胎模型的路面附着系数估算得到实时工况下汽车的最大减速度,并考虑线控制动减速度响应特性,建立线控制动减速度响应模型。建立TTC和安全距离模型,通过线控制动器制动过程的分析,制定了一种根据最大减速度值进行提前二级制动的分级避撞控制策略。在Carsim/Simulink联合仿真环境中,对所提出的控制策略进行仿真,结果表明,所提出的控制策略准确度高,避撞效果好。Aiming at the problem of insufficient accuracy and comfort of the automatic emergency control strategy,this paper proposes a hierarchical collision avoidance control strategy considering real⁃time operating conditions based on the response characteristics of the brake⁃by⁃wire dynamic deceleration.According to the GPS⁃based slope estimation and the road adhesion coefficient estimation based on the Brush tire model,the maximum deceleration of the car under real⁃time working conditions is obtained.At the same time,the dynamic deceleration response characteristics of the brake⁃by⁃wire are considered to establish the dynamic deceleration response model of the brake⁃by⁃wire.TTC and the safety distance model,through the analysis of the brake process of the wire control actuator,formulated a hierarchical collision avoidance control strategy that can advance the two⁃stage braking according to the maximum deceleration value.The control strategy proposed in this paper is simulated in the established Carsim/Simulink co⁃simulation environment,the results show that the control strategy proposed has high accuracy and good obstacle avoidance effect.

关 键 词：实时工况 分级避撞 响应特性 最大减速度 提前二级制动 

分 类 号：TN-9[电子电信]