面向控制的城市交通网络宏观动态模型

Control-oriented macroscopic dynamic model in urban traffic network

针对城市道路交通流非线性、不确定性和模糊性特点,提出了面向控制应用的城市交通网络宏观动态离散模型.基于大系统分解-协调理论,把整个城市道路大交通网络分为城市区域、城市快速公路、城市区域-城市快速公路3个子系统,分别建立了它们的宏观动态模型,并分析了这3个子系统模型之间的相互关系.对杭州市中心区域的实际交通流数据进行了仿真研究,结果表明该交通流模型较好地反映了城市路网的交通流信息,可以作为城市交通控制系统分析和设计的有力工具.

A control-oriented macroscopic dynamic traffic flow discrete model applicable to the nonlinear, uncertain, fuzzy system of urban traffic network was discussed. According to the principle of decomposition-coordination for large-scale systems, the whole urban traffic network system was divided into three subsystems of urban region, urban expressway and urban region-expressway. The subsystems＇ macroscopic dynamic models were presented respectively and the relation among the three models was also discussed. Computer simulation with actual Hangzhou traffic flow data shows that the traffic models can accurately express the traffic flow information on urban network preferably and be used for urban traffic control system analysis and design.