虚拟现实环境下交通仿真场景构建与逼真度评估方法研究

发布时间：2018-04-12 01:01

本文选题：虚拟现实 + 交通仿真　；参考：《北京交通大学》2017年硕士论文

【摘要】：近年来,随着中国城市化进程的加快,城市交通问题日益严重,为解决交通问题,需制定新的交通策略或新建交通设施,这都需要对交通状态进行仿真。但在对城市交通状况进行三维仿真过程中,大规模城市交通路网构建需要耗费大量的时间,如何快速构建路网并应用目前高速发展的虚拟现实技术来提高仿真的逼真度,这一直都是国内外学者所研究的课题。本文将构建一个可以快速构建路网并实时运行的仿真系统,采用多指标层次体系对仿真系统进行评估。针对城市交通视景仿真的相关现状,本文从以下三个方面进行研究:(1)对交通仿真的关键技术:三维建模技术及仿真运行技术进行了研究,并在Windows系统的程序框架内设计了一套仿真系统,该仿真系统能够实现路网的快速构建与实时交通仿真。(2)在交通仿真系统的基础上进行相关路网数据库的设计,所设计的路网数据表相互关联,能够表达路网数据之间的关系。通过对仿真系统信息的分类存储,能够使路网信息存储系统化并提高数据的查询速度。(3)对多指标评价体系进行研究,并针对交通仿真系统构建一套基于熵权-层次分析法的交通仿真评估体系,使用该评价体系对交通仿真系统进行评估,仿真系统的评估更具有合理性与科学性。本文在对交通仿真系统进行评估的过程中,首先是对其功能进行了分析。该仿真系统能够实现路网数据的读取与路网的快速构建,其中读取数据内容包括路网绘图区及CAD文件路网结点;该仿真系统还能够实现交叉口参数的设置,设置参数包括信号配时、车流量及车辆类型等参数,交通场景可以按照设置的参数运行。除对系统的功能分析外,本文还对仿真系统进行了逼真度与可信度评估,主要按照构建指标体系、确定指标权重的模式进行评估,评估结果显示该仿真系统有较好的三维模型逼真度与交通环境逼真度,可以满足一般的交通仿真需要。
[Abstract]:In recent years, with the acceleration of urbanization in China, urban traffic problems are becoming more and more serious. In order to solve the traffic problems, new traffic strategies or new traffic facilities are needed, which need to simulate the traffic state.However, in the process of 3D simulation of urban traffic situation, it takes a lot of time to construct a large-scale urban traffic network. How to quickly build the network and apply the current high-speed development of virtual reality technology to improve the fidelity of simulation.This has always been the subject of research by domestic and foreign scholars.In this paper, we will construct a simulation system which can quickly build the road network and run in real time, and evaluate the simulation system with multi-index hierarchy system.In view of the current situation of urban traffic scene simulation, this paper studies the key technology of traffic simulation from the following three aspects: 3D modeling technology and simulation operation technology.A simulation system is designed within the framework of the Windows system. The simulation system can realize the rapid construction of the road network and real-time traffic simulation. 2) on the basis of the traffic simulation system, the design of the related road network database is carried out.The designed road network data table is related to each other and can express the relationship between road network data.By classifying and storing the information of simulation system, it can systematize the storage of road network information and improve the query speed of data.According to the traffic simulation system, a traffic simulation evaluation system based on entropy weight and analytic hierarchy process (AHP) is constructed. The evaluation system is more reasonable and scientific.In this paper, the function of traffic simulation system is analyzed.The simulation system can realize the reading of road network data and the rapid construction of road network, which includes road network drawing area and CAD file network node, the simulation system can also realize the setting of intersection parameters.The setting parameters include signal matching, vehicle flow and vehicle type. Traffic scenes can be run according to the set parameters.Besides the functional analysis of the system, this paper also evaluates the fidelity and credibility of the simulation system, mainly according to the model of establishing index system and determining the index weight.The evaluation results show that the simulation system has good fidelity of 3D model and traffic environment and can meet the general traffic simulation needs.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491;TP391.9

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