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中南大学学报(自然科学版)

Journal of Central South University

第46卷    第7期    总第251期    2015年7月

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文章编号:1672-7207(2015)07-2727-08
基于混合Petri网的单点信号优化感应控制
牟海波,俞建宁,刘林忠

(兰州交通大学 交通运输学院,甘肃 兰州,730070)

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。

 

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

Optimization of traffic signal actuated control at isolated intersection based on hybrid Petri net
MU Haibo, YU Jianning, LIU Linzhong

School of Traffic and Transportation, Lanzhou Jiaotong University, Lanzhou 730070, China

Abstract: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.

 

Key words: traffic signal control; optimization of actuated control; modeling and simulation; hybrid Petri net; average delay

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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