城市快速路网最优控制模型  

Optimal control model for urban freeway networks based variable message signs(VMS)

作　　者：付巧峰[1] 

机构地区：[1]西安科技大学理学院,陕西西安710054

出　　处：《长安大学学报（自然科学版）》2010年第6期94-98,共5页Journal of Chang’an University(Natural Science Edition)

摘　　要：针对快速路最优控制过程的动态、非线性和离散最优控制的特性,应用了非线性最优交通控制方法,考虑路径诱导,采用二阶宏观交通流模型,对含有多起点、多讫点的快速路进行了建模,路径诱导措施通过可变信息信号来实现,并构建了一个集成的搜索算法求解,给出路径诱导的测试算例。仿真结果表明:在同等交通情况下,算例路网的性能有明显的提高,优化控制比无控制下路网总耗费时间缩短了8.9%,在入口处的排队也基本上消除了;所提出的集成搜索算法在提高路网的性能方面是有效的、实用的和可行的。The control of urban freeway network with multi-origin and multi-destination is a dynamic,nonlinear,discrete-time optimal control problem.This paper presented nonlinear optimization method for traffic control using a second order macroscopic traffic flow model.The control measure is route diversion by VMS.And this paper presents an integrated search algorithm.A test example for route diversion is given.The simulation results show that,under the same traffic conditions,the numerical example of network performance is improved greatly,the total consuming time is decreased 8.9% than the one of no control network and the queue of entrance is basically eliminated,the presented integrated search algorithm is efficient and applicable for increasing the network performance.1 tab,4 figs,9 refs.

关 键 词：交通工程 交通控制 多起点 多讫点 可变信息信号 非线性最优化 

分 类 号：U491[交通运输工程—交通运输规划与管理]