城市交通信号灯两级模糊控制及仿真研究

Urban Traffic Lights Based on Two-stage Fuzzy Control and Simulation

在分析城市交通信号控制研究现状的基础上,设计了单交叉口两级模糊控制系统。控制器通过检测器获得的各车道交通流量和排队长度来判断各个相位的交通强度,进而决定是否延长或终止当前的信号相位。以通过交叉口的平均车辆延误作为评价指标来衡量该控制器的控制性能,并采用Matlab编程实现了交叉口四相位的仿真系统。仿真结果表明,该方法能有效降低通行车辆在交叉口的平均延误,优于传统的感应控制方法。

Based on analyzing the current situation of urban traffic signal control, a two-stage fuzzy control system for single intersection was designed in this paper. The controller got flows and queues from its detectors to estimate traffic intensity, which was then used to determine whether the current signal phase should be extended or terminated. The average delay of the vehicles, which drove through the intersection, was used as a performance index in order to weigh the performance of this controller. A four-phase simulated system was designed and realized by using Matlab program. The results show that this method can effectively decrease the average delay in the intersection and is superior to a traditional vehicle actuated control method.