城市交通干线信号协调控制方案的过渡方法研究

发布时间：2018-05-07 18:03

本文选题：干线 + 协调控制　；参考：《浙江工业大学》2014年硕士论文

【摘要】：在干线协调控制过程中,为使时序相邻的不同信号控制方案在切换过程中所导致的系统扰动最小,需要在前后控制方案之间插入过渡方案。过渡方案的优化对于提高干线协调控制系统的控制效果具有重要的意义。本文针对干线协调控制过程中的具体问题,以干线交通信号协调控制方案间的过渡为研究对象,从控制方案间的快速切换方法以及优化过渡方法两个方面进行了深入研究,并对不同的过渡方法进行了对比分析,为干线协调控制系统在控制过程中进行不同控制方案间的切换提供技术支持。本文的主要工作如下： (1)对干线交通信号协调控制理论进行了介绍,并对协调控制过程中控制方案间的过渡问题进行了界定和描述,为后续对该问题的求解奠定基础。 (2)针对实际控制系统对控制方案间的快速切换需求,分别对直接切换方法、经典Add和Subtract过渡方法进行了分析,在此基础上综合考虑过渡时间和平滑特性,提出一种基于最佳相位差调整量控制方案的快速平滑过渡方法。该方法以使各交叉口相位差变化量最小为目标,优化计算得出各交叉口最佳相位差调整量,并以此为依据计算各交叉口在控制方案过渡期间的信号周期。实验表明,该方法能够使干线协调控制方案最多通过3个信号周期快速地过渡到新方案,且过渡期间的控制效果优于Add和Subtract方法。 (3)针对协调控制方案间的最优过渡问题,本文以BLX预测模型为基础,将过渡期间所有车辆从驶入干线到驶出干线所花的时间最短作为优化目标,提出了一种基于BLX预测模型的协调控制方案间的优化过渡方法。并在VISSIM仿真环境下将其与快速平滑过渡方法进行了对比分析,实验表明,基于BLX预测模型的优化过渡方法更能适应不同流量下的信号控制方案间的过渡,具有更好的控制效果。
[Abstract]:In the process of coordinated control of trunk lines, in order to minimize the disturbance caused by different signal control schemes with adjacent time series in the switching process, it is necessary to insert a transition scheme between the front and rear control schemes. The optimization of transition scheme is of great significance to improve the control effect of trunk line coordinated control system. Aiming at the specific problems in the process of coordinated control of trunk lines, this paper takes the transition between coordinated control schemes of trunk traffic signals as the research object, and makes a deep research on the fast switching method and the optimization method of transition between the control schemes. Different transition methods are compared and analyzed to provide technical support for switching between different control schemes in the trunk line coordinated control system. The main work of this paper is as follows: 1) the theory of coordinated control of trunk traffic signals is introduced, and the transition problem between control schemes in the process of coordinated control is defined and described, which lays a foundation for the subsequent solution of the problem. 2) aiming at the requirement of fast switching between control schemes in practical control system, the direct switching method, classical Add and Subtract transition method are analyzed respectively. On this basis, the transition time and smoothing characteristics are considered synthetically. A fast smooth transition method based on the optimal phase difference control scheme is proposed. With the aim of minimizing the change of phase difference of each intersection, the optimal phase difference adjustment quantity of each intersection is obtained by optimization calculation, and the signal period of each intersection during the transition period of control scheme is calculated according to this method. Experiments show that this method can make the trunk line coordinated control scheme transition to the new scheme quickly through up to three signal cycles, and the control effect during the transition period is better than that of Add and Subtract methods. In order to solve the optimal transition problem between coordinated control schemes, this paper, based on the BLX prediction model, takes the shortest time taken by all vehicles during the transition period from entering to leaving the trunk line as the optimization objective. An optimal transition method between coordinated control schemes based on BLX predictive model is proposed. It is compared with the fast smooth transition method in the VISSIM simulation environment. The experimental results show that the optimal transition method based on the BLX prediction model is more suitable for the transition between the signal control schemes under different flow rates and has better control effect.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U491.54

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