Abstract: In view of the delay time of the car following model which leads to the traffic congestion. The paper redefines the coupled map car following model under CPS（Cyber Physical System）. In the process of the interaction between the physical end which delay causes congestion and the network terminal embedded the computation function, the concept of the equilibrium distance is proposed. On this basis, the response delay time is quantified. Thus, it can increase the vehicle distance, lengthen the operating time line indirectly, and provide a predictive function to the driving system. The feedback control of the front and rear cars is considered, and different feedback coefficients are selected. Simulation results show that the model of the coupled map car following under CPS can suppress traffic congestion significantly.

Key words: cyber physical system, coupled map car following model, response delay time, feedback control, suppress traffic congestion

摘要： 针对车辆跟驰模型中信息响应延迟时间导致交通拥堵，通过信息物理系统对耦合映射跟驰模型重新定义，在嵌入计算功能的网络端与延迟导致拥堵的物理端相互作用下，提出均衡车头距的概念，在此基础上量化跟驰过程中的响应延迟时间，从而间接增大了车头距，拉长可操作时间线，给驾驶系统提供预估功能。考虑前车、后车对己车的反馈控制，并选取不同的反馈系数，仿真结果表明CPS定义下的耦合映射跟驰模型，对交通拥堵具有明显的抑制效果。

关键词: 信息物理系统, 耦合映射跟驰模型, 信息响应延迟, 反馈控制, 拥堵抑制