共查询到18条相似文献,搜索用时 156 毫秒
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基于相序优化的多相位模糊交通控制 总被引:16,自引:0,他引:16
针对单交叉路口进行模糊交通控制算法的研究.首先提出一个简化的交叉路口交通流模型,设计一种基于相序优化的模糊控制器,然后以车辆平均延误时间为控制目标,采用模糊控制器和相序优化器联合进行交通控制.前者用来决定改变当前绿灯相位的时刻,后者从相序中根据优先权的大小决定下一个放行相位.仿真研究表明,该模糊控制器能更有效地对单路口进行多相位闭环控制,控制效果令人满意. 相似文献
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城市单交叉路口信号灯的六相位模糊控制 总被引:5,自引:0,他引:5
讨论城市单交叉路口交通信号灯的实时控制,考虑到行人和非机动车,对其进行六相位模糊控制,提出以当前相位绿灯已通行时间、当前相位的队长以及它与后继相位的队长之差三者决定当前相位绿灯延时的方法,给出算法和该三维控制器设计,指出选择控制规则的原则,应用此方法进行仿真研究,结果令人满意。 相似文献
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针对公交优先交通信号控制问题,研究了公交优先的信号控制策略,提出了一种变论域模糊神经网络公交优先智能控制方法.提出了基于相位优先度值的公交优先相位选择方法,并给出了其数学描述.建立了绿灯时间的3层模糊控制模型,分别为红灯排队疏散时间、绿灯延长时间和论域调节因子模糊控制器,其中红灯排队疏散时间和绿灯延长时间两个模糊控制器的输出变量均采用变论域,论域的变化考虑混合交通、天气情况、车流转向等因素由论域调节因子模糊控制器确定.模糊控制器采用粒子群优化神经网络实现.仿真结果表明该方法具有较好的公交优先控制效果. 相似文献
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论文提出了单路口信号灯F-GA-F控制策略,该策略利用预估车流模糊推算下一个周期的值,采用遗传算法优化目标函数,得到各个相位的绿灯时间,然后,对各个相位的绿灯时间采用模糊控制实时地进行调整,使单路口在一个周期时间里的交通流量最大。计算机仿真结果表明,控制策略性能优良。 相似文献
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张琳琳 《计算机测量与控制》2024,32(6):152-159
高速公路交通流特征复杂多变,受到诸多影响因素的共同作用,如天气、道路状况、车辆类型等等。因此,如何获取交通流逻辑控制条件并实现精准调节难度较大。为此,本研究设计新的高速公路实时交通流模糊逻辑优化控制系统。对于系统的硬件部分,设计车流控制模块、无线传输车载终端、实时交通流逻辑调度模块、模糊控制器模块,并确定各个模块之间实时连接关系。对于系统的软件部分,求解交通流逻辑控制条件,联合高速公路实时通行相位条件,调节模糊控制器,并根据高速公路交通路网模型,推导交通流优化控制条件的求解表达式,完成高速公路实时交通流模糊逻辑优化控制系统的设计。实验结果表明,本系统可以解决逻辑协调错误的问题,且能够有效控制高速公路车流量。 相似文献
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Xiangjie Kong Guojiang Shen Feng Xia Chuang Lin 《International Journal of Control, Automation and Systems》2011,9(1):60-68
This paper presents a new two-direction green wave intelligent control strategy to solve the coordination control problem
of urban arterial traffic. The whole control structure includes two layers — the coordination layer and the control layer.
Public cycle time, splits, inbound offset and outbound offset are calculated in the coordination layer. Public cycle time
is adjusted by fuzzy neural networks (FNN) according to the traffic flow saturation degree of the key intersection. Splits
are calculated based on historical and real-time traffic information. Offsets are calculated by the real-time average speeds.
The control layer determines phase composition and adjusts splits at the end of each cycle. The target of this control strategy
is to maximize the possibility for vehicles in each direction along the arterial road to pass the local intersection without
stop while the utility efficiency of the green signal time is at relatively high level. The actual application results show
the proposed method can decrease the average travel time and average number of stops, and increase the average travel speed
for vehicles on the arterial road effectively. 相似文献
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This paper presents a multi-agent system based on type-2 fuzzy decision module for traffic signal control in a complex urban road network. The distributed agent architecture using type-2 fuzzy set based controller was designed for optimizing green time in a traffic signal to reduce the total delay experienced by vehicles. A section of the Central Business District of Singapore simulated using PARAMICS software was used as a test bed for validating the proposed agent architecture for the signal control. The performance of the proposed multi-agent controller was compared with a hybrid neural network based hierarchical multi-agent system (HMS) controller and real-time adaptive traffic controller (GLIDE) currently used in Singapore. The performance metrics used for evaluation were total mean delay experienced by the vehicles to travel from source to destination and the current mean speed of vehicles inside the road network. The proposed multi-agent signal control was found to produce a significant improvement in the traffic conditions of the road network reducing the total travel time experienced by vehicles simulated under dual and multiple peak traffic scenarios. 相似文献
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目前高速公路运营管理中,传统机电系统中的视频监控、收费系统等已经稳定运行多年,但功能相对单一,信息孤岛现象比较严重。为解决这一问题,重点探讨了高速公路智能管控系统如何与系统外部的专用短程通信(DSRC)道路交通流、全程断面的交通流监测数据、气象状态的监测数据、交通事件的视频检测数据进行无缝接入进行设计。同时,兼顾路网层面的信息服务,实现与交通运输部、省交通运输厅路网中心、周边高速路网、地方道路管理部门、气象部门等之间的数据共享与交换。为高速公路运行状态监测、预警、辅助决策、应急管理、信息发布等功能提供数据支撑。 相似文献
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以减小车均延误为目标,在调查交叉口交通流量和当前信号控制的基础上,采用韦伯斯特配时算法进行优化计算,并通过通行能力、交通流量比等指标来确定信号周期时长和各相位绿灯时间,改善相位饱和度,从而充分利用道路的通行能力。以建设大道新华路交叉口为例,基于实际数据对优化前后的交叉口利用vissim软件进行仿真,结果表明,优化后各相位的饱和度较优化前更为平均,没有出现很高或很低的极端情况,优化后的车均延误明显改善。 相似文献
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交通信号自适应模糊控制器的设计及稳定性分析 总被引:7,自引:1,他引:7
针对城市交通路口的信号控制,提出一种自适应模糊控制器,并对其稳定性进行分析.通过控制器给出路口实时信号配时,根据红灯相位的等候车辆平均损失和绿灯相位释放车辆的平均增益,给出了模糊控制器的自适应算法,以实时修正其模糊规则.在自适应模糊控制器的稳定性分析中,采用模糊控制系统闭环模型的模糊关系矩阵,证明在路口车辆随机产生的情况下,模糊控制系统是稳定的.仿真结果表明,自适应模糊控制器比全感应控制器、简单模糊控制器更能适应路口交通流的变化,极大地改善了系统性能. 相似文献
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Mesoscopic traffic simulation is a promising technology for handling large-scale dynamic traffic assignment problems. Meanwhile, GPU has been a research hotspot in the last decade because of its massive parallel performance compared with CPU. Although several works deal with GPU-based parallel performance, few have addressed the issue of real-world network applications. Thus, the performance of GPU on realistic road networks is still not clear. In this paper, an ideal grid network and a realistic Singapore expressway network are implemented and compared. The former gets a speedup of 10.00 while the latter only get a speedup of 2.37. The two main reasons for this lower efficiency of a real network are the more complex data structure caused by network topology and fewer numbers of threads due to the scale of the expressway network. Future works need more effort to develop a system with better data structure and better designed concurrent threads. 相似文献