基于混合Petri网的单点信号优化感应控制  

Optimization of traffic signal actuated control at isolated intersection based on hybrid Petri net

作　　者：牟海波 俞建宁[1] 刘林忠[1] 

机构地区：[1]兰州交通大学交通运输学院,甘肃兰州730070

出　　处：《中南大学学报（自然科学版）》2015年第7期2727-2734,共8页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(71361018;71161016);甘肃省财政厅基本科研业务费资助项目(213058);甘肃省科技支撑计划项目(212248);兰州交通大学青年基金资助项目(2011023)~~

摘　　要：为研究单交叉口交通信号感应控制问题,建立由连续Petri网描述交通流和离散Petri网描述交通信号控制的混合Petri网模型。根据连续Petri网的离散化方法,以连续Petri网中的参数为基础,提出各个相位车辆总停留时间的计算方法。为优化各个相位的绿灯时间,以车辆总停留时间最小为目标建立优化感应控制模型,并进行仿真计算。研究结果表明:采用基于混合Petri网的优化感应控制方法时,4个相位的车辆平均延误分别为18.19,15.65,14.88和15.24 s,与基于混合Petri网的一般感应控制方法、基于离散Petri网的感应控制方法相比较,平均延误的最大缩短率分别为26.26%和38.33%。基于混合Petri网的优化感应控制方法可以较好地实现单点信号控制。To study the traffic signal actuated control at isolated intersection, a hybrid Petri net model consisting of a continuous Petri net model for modeling traffic flow and a discrete Petri net model for describing traffic signal control was presented. According to the discretization method of continuous Petri net, the formula of total vehicle residence time of each phase was presented based on the parameters of continuous Petri net. To optimize the green time of each phase, taking the minimal average vehicle residence time as objective, a mathematical model for the optimization of actuated control was established, and a simulation calculation was carried out. The results show that by adopting the optimization method of actuated control based on hybrid Petri net, average delay time of four phases is 18.19, 15.65, 14.88 and 15.24 s, respectively. Compared with a general actuated control method based on hybrid Petri net and an actuated control method based on discrete Petri net, the maximal shortening rate of average delay time is 26.26% and 38.33%, respectively. So, the optimization method of actuated control based on hybrid Petri net can better realize signal control of traffic light at isolated intersection.

关 键 词：交通信号控制 优化感应控制 建模仿真 混合PETRI网 平均延误 

分 类 号：U491.51[交通运输工程—交通运输规划与管理]