【作者】 朱双荣；

【导师】 费奇；

【作者基本信息】 华中科技大学 ， 系统工程， 2005， 硕士

【摘要】 智能运输系统是未来交通发展的方向,仿真技术作为研究交通系统的有效手段,在这个领域有很好的应用前景。成功的搭建城市交通仿真模型,可为交通道路设计提供依据,同时为交通智能控制与决策提供测试与评价的平台。本文介绍了交通仿真技术以及国内外研究现状,对宏观、微观以及中观仿真模型的优缺点进行了对比,并阐述了搭建城市道路交通中观仿真系统的目的及意义。在此基础上介绍了面向对象的建模技术并进行了面向对象的中观交通仿真模型的研究。交通流仿真系统的模型主要包括车辆产生模块、交叉口信号控制模块、路段车辆行驶模块、交叉口前车辆路径选择模块。在模型中,车辆以组的形式组织起来,每组包括了一系列具有相同交通运动学特性的车辆,根据该运动学特性来更新每组的车速及位置。同时通过驾驶员的实时路径选择行为综合算法模拟了路段出口处车辆的分流,从而实现了从中观的角度模拟车辆在整个路段上的行驶行为。接着根据该模型给出了系统体系结构和系统的运行流程,并对程序设计中涉及到的比较重要的类和函数给出了详细描述。最后,本文给出了系统仿真结果并通过与相应微观仿真结果进行对比分析,证明了该中观交通流仿真模型具有一定的精确性,仿真实验的数据结果符合交通流的基本特性,从而具有广泛的应用性。通过论文总结,进一步明确了中观仿真系统未来的研究方向。更多还原

【Abstract】 Intelligent transportation system is the future of development of traffic. As an effective method to research the traffic system, the simulation technology is useful in this field. It can not only help the design of the traffic roads, but also provide the testing and estimate platform for the intelligent control and decision. This thesis introduces the traffic simulation technology and the research status in native and foreign countries. And it describes the aim and meaning of building up the mesoscopic simulation system of the traffic on the city road. And it introduces the object orientation technology of building up the model and the research of the object orientation mesoscopic traffic simulation model. This model includes vehicle create mode, cross signal control mode, vehicle running mode and cross routing choice mode. In this model, the vehicles are organized in the different groups. Every group includes a series of vehicles with the same traffic dynamics. We can update the speeds and positions of the vehicles according to the dynamics. Also this thesis uses the real time routing choice arithmetic to simulate the vehicles’ diffluence at the exit of the link. Accordingly it simulates the running of the vehicles on the whole link through the mesoscopic way. And then it presents the system frame and system running flow. At the same time the thesis details the key species and functions. Then the thesis provides the output of the mesoscopic simulation and the contrast between the mesoscopic methods and the microscopic ones. On this way, the thesis proves the accuracy and wide application of the mesoscopic simulation. At last, the thesis makes a summary and points out the direction of the mesoscopic simulation system’s development.更多还原