基于多智能体的交通流微观仿真

【作者】 王家凡；

【导师】 罗大庸；

【作者基本信息】 中南大学 ， 计算机应用技术， 2004， 硕士

【摘要】 在智能交通系统中，交通流仿真软件是人们评估交通管控策略、验证交通流理论中新的算法、和培训交通管理人员的有效工具。同时，多智能体系统，作为计算机科学与分布式人工智能领域的最新进展，提供了研究像城市交通系统这样的复杂系统一个新的途径。本文建立了一个基于多智能体的城市交通流微观仿真系统，主要展开了以下研究： ·确立了基于多智能体的交通流微观仿真模型的三层体系结构，分别为车辆智能体、路段智能体和路网智能体。车辆智能体仿真路网中车辆的运行，路段智能体收集各种状态信息，路网智能体控制交通系统的各个组成部分。通过三部分的协调与合作，仿真交通系统中从车辆运行的微观行为到各种控制策略的实施全过程； ·利用多智能体系统理论对车辆的微观换道行为重新建模。考虑到车辆在变换车道过程中的竞争与合作关系，并对这种竞争与合作产生的原因，合作的方式进行了讨论； ·使用面向对象程序设计语言开发了基于多智能体的交通流微观仿真软件。包括路网描述模块、车辆行驶模块、行驶控制模块、监控与记录模块等； ·在程序设计中广泛使用设计模式。各种控制模块不是“硬编码”在系统中，增强了系统的可重用性、灵活性和可扩展性。更多还原

【Abstract】 Traffic problem is an important problem all over the world, it has seriously influenced the society, how to solve it is the key problem people pay attention to, now, "intelligent transportation system", which aims to solve the traffic problem using the advanced science and technology, is becoming the research emphasis in traffic fields. In ITS, traffic simulation system is the most efficient tool in the operation of transportation systems. Through simulate the real world’s traffic flow, traffic simulation system can test traffic management strategies, validate traffic control algorithm, help to train new engineer, and so on.Meanwhile, multi-agent system, a new paradigm of computer and distributed artificial intelligence, provides a new way for the research of such complicated systems as urban traffic system. This research develops an agent-based microscopic traffic simulation system, which focus on:? Establish an agent-based three-level model architecture on traffic flow simulation system, which are vehicle agent, segment agent and road network agent. Vehicle agent simulates vehicle’s microscopic behavior, while segment agent gather all information throughout the road networks, and road network agent control the transportation systems. Through three parts’ coordination and cooperation, the traffic simulation system could model many traffic behaviors from vehicle moving to traffic control strategies.? Re-model the vehicle’s lane-changing behavior through the utilization of multi-agent system theory. Analyze compete and cooperate relationship between each vehicle when lane-changing behavior occurs. Also, some manners of cooperation are discussed.? Develop an agent-based traffic simulation software, which implemented in C++ using object-oriented programming, includes road network depict module, vehicle moving module, moving control module, surveillance and record module, etc.? Design patterns are widely used in programming, so various of control modules are not "hard-coded" in the system. By doing so, thesoftware system could be more flexible, extendable and ultimately reusable.更多还原