【作者】 肖业伟；

【导师】 黄辉先；

【作者基本信息】 湘潭大学 ， 电力电子与电力传动， 2004， 硕士

【摘要】 本文以湖南省教育厅基金项目“城市智能交通信号机系统的研究”为背景，针对城市交通信号控制展开研究。作者在大量搜集和研究国内外文献资料的基础上，首先对城市交通流理论和城市交通信号系统控制进行了理论分析与研究。然后，参考文献[29]建立了城市小型区域五交叉路口交通网络仿真模型，提出了采用遗传算法多目标优化，全局寻优网络各路口相位时间的自适应方法，并进行了计算机仿真应用研究。在MATLAB环境下，作者根据在一个周期内使各交叉路口各车道绿灯结束时等待放行车辆数总和最小，且在一个周期结束时的等待放行车辆数总和尽可能小的原则进行仿真实验。通过固定各交叉路口周期参数，并预测各自下一周期的车流量，来实时分配最佳相位时间。实验结果表明：该方法是有效的和可行的；在网络交通流完全相同的情况下，它与定周期控制相比，明显减少了一个周期内在绿灯结束时的总延迟辆数，特别是当交通流较大时，效果尤其明显。本文还详细地介绍了一套智能交通信号机系统的整体设计。其硬件电路主要有：主控电路、人机接口电路、通讯接口电路、应急电路和功率驱动电路等。系统软件设计包括：主程序、核心处理程序、通讯程序和交通信号机配时和灯色数据生成，以及上位机的交通信号灯色方案生成环境。实验表明：该系统能够实现多相位、变相序控制。稍加改进投入到实际应用中，它将能够在一定程度上解决混合交通流的问题。更多还原

【Abstract】 On background of fund project of Hunan Province Education Office — the Research of Urban Intelligent Traffic Signal Semaphore System, this paper makes research on urban traffic signal control. The author collected and researched for lots of domestic and overseas articles. Firstly, the paper analyzes and studies for urban traffic flow theory and urban traffic signal system control. Then, the paper proposes a adaptive method which adopts the multi-objective genetic optimization algorithms to optimize phase duration time on each intersection. It bases on traffic network simulation model with five intersections in mini-district which is described in paper [29]. And it is implemented in a simulation circumstance. Under the MATLAB environment, the author accords to the rules which make the total number of waiting vehicles minimize in a cycle when the green signal is ending, and make the total number of waiting vehicles as less as possible at the end of a cycle on each lane of the intersection. The traffic flow of next cycle is forecast and allocated the best phase time in real-time by fixing the cycle on each intersection. The result indicates that it is feasible. Compared with the fixed-time control under the same traffic flow, the new measure obviously reduces the total waiting vehicles at the end of green in a cycle, especially when the traffic flow is busy. The paper also introduces in detail a set of whole design Intelligent Traffic Signal System. Hardware mainly includes the kernel control circuit, man-machine interface circuit, communication interface circuit, urgent circuit, power drive circuit and so on. Moreover, the system software is briefly introduced which includes main program, kernel disposing program, communication program and the produced data of allocating signal time and color for traffic semaphore, and the program of integrate environment on upper-machine. At last, the test results show that the system can realize the sequence control of multi-phase and variable phase. Improved slightly to the actual application, it can be solved the problem of mixture traffic flow to some extent.更多还原