城市干线交通信号协调控制优化与仿真研究

发布时间：2018-01-14 11:30

本文关键词：城市干线交通信号协调控制优化与仿真研究　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：在城市交通中，干线是城市路网的重要组成部分，承担了大量的交通负荷，，干线的交通畅通对改善城市交通状况具有很大的作用，通过干线交通信号协调优化来缓解交通问题是一项复杂的课题。因此，论文以城市干线为研究对象，对城市干线交通信号控制协调优化与仿真方法和策略进行了深入的研究，主要内容包括： 1.论文首先从目前城市干线交通和微观交通流仿真的现状出发，讨论了交通信号控制的基本理论和遗传算法的相关知识，对城市干线的交通特性和当前主要的信号周期优化、绿信比优化、相位差优化等几种干线交通信号协调优化控制方法进行了分析。 2.针对交通信号配时优化约束条件多，计算效率低，算法难收敛的特点，论文采用交通流理论建立交通波模型，并提出一种新的排队长度预测模型，以干线系统内车辆平均延误时间最小为优化控制目标，采用基于比例分配解码方法的遗传算法来进行求解。 3.论文采用计算机仿真技术结合微观交通流仿真理论建立了城市干线交通信号微观仿真系统。该系统通过将交通元素组件化提高了系统的可重用性，并将车辆排队阻塞和左转车辆的影响考虑进去，建立了车辆到达模型、运行模型、排队消散模型和左转车辆避撞模型等，最终该系统能够成功模拟现实交通。 4.针对干线实例，在城市干线交通信号微观仿真系统中分别采用单点信号控制、定时协调信号控制和基于比例分配解码方法的遗传算法协调控制三种控制策略进行仿真实验，并对排队长度，平均延误时间、平均停车次数等控制参数进行详细的对比和分析。仿真结果验证了基于比例分配解码方法的遗传算法协调控制方法的可行性和有效性。论文的研究对于城市干线交通信号协调优化具有较大的理论意义，为解决实际的城市干线交通问题提供了参考的方法和途径。
[Abstract]:In urban traffic, trunk line is an important part of urban road network, which bears a lot of traffic load. The smooth traffic of trunk line plays a great role in improving the urban traffic situation. It is a complex task to solve traffic problems by optimizing traffic signal coordination. Therefore, this paper takes urban trunk lines as the research object. The methods and strategies of coordination, optimization and simulation of traffic signal control in urban trunk lines are studied. The main contents are as follows: 1. Firstly, the basic theory of traffic signal control and the related knowledge of genetic algorithm are discussed based on the current situation of urban trunk traffic and microscopic traffic flow simulation. The traffic characteristics of urban trunk lines and the main signal cycle optimization, green signal ratio optimization, phase difference optimization and other traffic signal coordination optimization control methods are analyzed. 2. In view of the characteristics of traffic signal timing optimization, low computational efficiency and difficult convergence, traffic wave model is established by traffic flow theory, and a new queue length prediction model is proposed. Taking the minimum average delay time of vehicle in trunk system as the optimal control target, the genetic algorithm based on proportional allocation decoding method is used to solve the problem. 3. The paper uses computer simulation technology and micro traffic flow simulation theory to set up the traffic signal micro simulation system of urban trunk line, which improves the reusability of the system by making the traffic element compartmentalized. Taking into account the influence of vehicle queue congestion and left-turn vehicle, the vehicle arrival model, running model, queue dissipation model and left-turn vehicle collision avoidance model are established. Finally, the system can successfully simulate the real traffic. 4. Single point signal control is used in the micro simulation system of traffic signal in urban trunk line. Three control strategies, timing coordinated signal control and genetic algorithm coordinated control based on proportional allocation decoding method, are simulated, and the queue length and average delay time are tested. The simulation results show the feasibility and effectiveness of the genetic algorithm coordinated control method based on the proportional allocation decoding method. The research of this paper is of great theoretical significance for the coordination and optimization of urban trunk traffic signals, and provides a reference method and approach for solving the actual urban trunk traffic problems.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U491.54;TP18

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