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动态交通分配建模研究及与信号控制一体化分析_
其他题名Study on dynamic traffic assignment approaches and modeling integrated traffic control systems
李润梅
学位类型工学博士
导师王飞跃
2005-05-01
学位授予单位中国科学院研究生院
学位授予地点中国科学院自动化研究所
学位专业控制理论与控制工程
关键词智能交通系统 动态交通分配 交通控制 变分不等式 Intelligent Transportation Systems Dynamic Traffic Assignment
摘要先进的驾驶员信息系统是智能运输系统的重要组成部分。作为其核心和基础,动态交通分配一直是智能交通领域的研究热点和焦点问题。城市交通控制作为交通网络管理的有效手段,它与交通分配的动态结合将为交通流的管理提供更大的空间。在这个背景下,本文作如下研究: 1)网络优化评价和动态时空分区 本文提出了交通网络动态可分配性的概念,来表征动态交通网络的优化有效性指标。本文结合较为成熟的控制网络空间分区方法,引入时间分区的概念,以可分配性为判别标准,建立了网络时空划分的动态框架。 2)面向动态交通分配的路段费用函数建模研究 本文基于波动理论,考虑了车辆的实际长度,给出了车辆在路口的信号延误函数和平均排队指标。提出的函数模型不仅适用于不饱和状态,也能很方便的计算饱和状态下车辆在路口的运行信息。考虑了有实际长度的饱和排队以及由此带来的车辆在路段上的连续行驶的影响,建立了有排队路段费用函数计算模型。 3)建立了饱和交通网络的动态交通分配的变分不等式模型及控制一体化模型 本文建立了饱和动态交通分配的变分不等式模型,提出了边界瞬时用户最优交通分配的概念。在模型的建立中,详细考虑了基于First-In-First-Out (FIFO)规则下的交通流传播约束以及容量约束。基于饱和网络的车辆路段行驶时间函数的分析,对静态时空推广网络进行了有实际长度排队的修正。在边界瞬时均衡的概念下,假定饱和网络各个路段的交通流达到瞬时稳态,将信号路口简化为一个路段瓶颈。通过调整绿信比来对不可避免的排队进行管理,共同实现网络交通流的优化配置。 4)建立了多用户交通流动态交通分配的变分不等式模型 这部分内容是上述研究的延伸。本文基于超车现象的分析,对网络中的车辆以行驶速度为关键因素进行了分类,详细考虑不同类型车辆之间可能存在的不对称影响,建立了多用户动态行驶时间函数。重新构造分类有序的交通流形式,建立了多用户的动态交通分配模型准确描述多用户条件下交通流的动态变化,对同一类型车辆构成的交通流,FIFO规则依然成立。
其他摘要Advanced Travelers Information Systems (ATIS) is one of the major parts of Intelligent Transportation Systems (ITS). As the core and base of the ATIS, Dynamic traffic assignment (DTA) is one of the focuses studied by researchers. Integrated approaches to simultaneously consider both traffic control systems and travels’ behavior should provide the best opportunity for reducing the total network cost. Based on which, this paper does the following main researches: 1) The traffic network optimization assessment and dynamic time-space division In this paper, a new concept of assignmentability is proposed. The concept is used to assess the efficacy of the dynamic traffic assignment on road networks. Combining with the space division methods used in traffic control strategy, the time-space division framework is developed, in which the concept of assignmentability is the main principle. 2) Research on link travel time functions of saturated networks In this paper, based on wave theory, the signal delay queue delay functions experienced by vehicles at intersections are given considering the physical lengths of vehicles. When to calculate the link travel time, the influence of saturated physical queue length is considered. 3) Study on modeling dynamic user-optimal assignment and integrated traffic control systems in saturated urban traffic networks In this paper, a dynamic user-optimal variational inequality assignment model in saturated urban traffic network is proposed. In this model, the flow propagation constraint, First-in-first-out (FIFO) constraint and link capacity constraint and the physical queue are considered. Based on this model, an integrated traffic assignment and control model is developed. This integrated system is expected to play an important role to support traffic management and ARGS in a traffic network. 4) Study on multiple user-classes dynamic traffic assignment In this paper, a discrete time multiclass dynamic user optimal traffic assignment model is proposed. The phenomenon of overtaking existing in traffic networks is considered. The distinction between user-classes is typically based on vehicle travel speed. According to it, vehicles are classified into different types. The multiple user-classes link travel time functions are proposed where asymmetries interactions between the user-classes sharing the same road infrastructure are taken into account. For the same class user, FIFO principle will hold.
馆藏号XWLW916
其他标识符200218014603166
语种中文
文献类型学位论文
条目标识符http://ir.ia.ac.cn/handle/173211/5861
专题毕业生_博士学位论文
推荐引用方式
GB/T 7714
李润梅. 动态交通分配建模研究及与信号控制一体化分析_[D]. 中国科学院自动化研究所. 中国科学院研究生院,2005.
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