基于双路口划分的城市绿波模糊控制方法

用模糊控制方法设计城市交通绿波协调控制方法。将多路口的绿波带划分为若干个协调控制相位差优化双路口子系统,子系统内路口间的相位差需要两个路口的交通参数确定,各个路口的各相位绿灯时长由各自的绿灯时长模糊控制快完成。通过子系统的逐级串联,完成整个绿波干线上的相位差计算。该方法避免建立绿波带内各路口的综合模型,减少了模糊规则和计算量,同时减少了多个路口控制机之间的数据交换。在VISSIM仿真中将相位差优化模糊块嵌入到干线绿波方向绿灯时长模糊控制块中实现。以延误时间和停车次数作为评价指标,实现城市干线上绿波协调控制的优化配置。

Green Wave Fuzzy Control Method of Urban Traffic Based on 2-Intersection Split

Fuzzy Control Logic is utilized to design a Green Wave Coordinate Control of urban traffic. The urban arterial traffic is divided into several 2-intersection split subsystems. The phase difference of the subsystem depends on both the parameters of two intersections, while the green time of each phase is independently computed by the green time fuzzy logic module. The green wave forms after the subsystems finish the calculations of green time and phase difference independently or coordinately. The method proposed reduced the fuzzy rules compared with the comprehensive model. It also reduces the data exchanges among intersections. The simulation in VISSIM combines the phase difference optimization fuzzy logic with the green time fuzzy logic. The delay time and the stop time are taken as measurement indicators to design a suitable control method on the arterial traffic.