交通拥堵发生时车道非同态性变化的仿真分析.pdf

第18 卷第5 期 系 统 仿 真 学 报© Vol. 18 No. 5 2006 年5 月 Journal of System Simulation May 2006 交通拥堵发生时车道非同态性变化的仿真分析 关 伟 (北京交通大学交通运输学院系统工程与控制研究所 北京 100044) 摘 要 交通系统的状态转移是一个正负反馈交替发生作用的过程 首先提出了同态度量指标 时空差异度指标等新概念用于定性判断交通系统的状态 并在此基础上 建立了一组变参数线性 方程用以描述交通系统状态转移的正负反馈交互迭代的过程 最后以某城市环路一个路段发生交 通拥堵的过程为实例 仿真分析了交通拥堵发生时车道非同态性变化的过程 仿真结果表明提出 的模型能较好地反映车道非同态性变化的实际情况 关键词 交通流模型 交通拥堵 仿真 定性推理 中图分类号 U491 文献标识码 A 文章编号 1004-731X (2006) 05-1339-04 Simulation of Cross-lane Inhomogeneities in Traffic Jam Formation GUAN Wei (Institute of Systems Engineering and Control, Traffic and Transportation School, Beijing Jiaotong University, Beijing 100044, China) Abstract: The states transition of an urban traffic system is an iterative process that consists of both a positive feedback mechanism and a negative feedback mechanism. Some new concepts such as the Homogeneous Measure Index (HMI) and Spatio-temporal Difference Index (SDI) were proposed to judge the inhomogeneities of the traffic flow, and a set of linear parameters -varying model was used to describe the mechanism of the states transition of traffic flow. As an empirical study, the process of the traffic jam formation was described by the data obtained from an actual traffic system, and this process was simulated by the method proposed as well. Comparing the simulation results with the actual data, it is proven that the results obtained by the proposed model coincide with the actual varying of cross-lane inhomogeneities and the method proposed is feasibility. Key words: traffic flow model; traffic jam