本文選題：車路協(xié)同　切入點：視景仿真　出處：《北京交通大學》2014年碩士論文

【摘要】：車路協(xié)同系統(tǒng),簡稱CVIS,是涉及多學科交叉與融合方法,利用大規(guī)模并行計算、傳感器網(wǎng)絡(luò)等先進技術(shù),實現(xiàn)道路交通信息的智能感知與人、車、路三位一體協(xié)調(diào)發(fā)展的大規(guī)模實時分布式系統(tǒng)。三維視景仿真方法是將計算機技術(shù),圖形圖象技術(shù),光學技術(shù),控制技術(shù)等多種高科技的結(jié)合,用戶借助必要的設(shè)備以自然的方式與虛擬環(huán)境中的對象進行交互作用、相互影響,對于提高系統(tǒng)規(guī)劃的合理性與研制效率具有明顯的促進作用。 論文通過選取車路協(xié)同系統(tǒng)的車車、車路交互等典型應(yīng)用為研究對象,將視景仿真應(yīng)用到車路協(xié)同仿真領(lǐng)域內(nèi),對車路協(xié)同系統(tǒng)的三維視景仿真技術(shù)進行研究。將車路協(xié)同視景仿真部分集成為一個聯(lián)邦成員,模擬整個車路協(xié)同系統(tǒng)的視景仿真。 論文以車路協(xié)同系統(tǒng)仿真為基礎(chǔ),采用Multitgen Paradigm公司的可視化仿真軟件VEGA/Creator,構(gòu)建起車路協(xié)同系統(tǒng)所需的局部仿真交通網(wǎng)絡(luò)的視景仿真模型,建立了視景仿真模型庫。并以此為基礎(chǔ),利用多細節(jié)層次模型對模型進行優(yōu)化,完成行人與車輛的多細節(jié)層次模型改造,提高了虛擬仿真的畫面渲染效率。針對原始模型結(jié)構(gòu)復雜的問題,采取基于功能的仿真模型節(jié)點結(jié)構(gòu)優(yōu)化法,對模型的節(jié)點組織結(jié)構(gòu)進行優(yōu)化,提高系統(tǒng)對模型功能節(jié)點的搜索效率。在單車仿真方面,借助虛擬手套和慣性傳感器設(shè)備設(shè)計完成交互式輔助駕駛平臺,使得仿真操作人員能夠通過數(shù)據(jù)手套對單車仿真中的車輛輔助駕駛設(shè)備進行控制,完成對視景仿真系統(tǒng)的交互式設(shè)計。在仿真平臺優(yōu)化方面,設(shè)計了基于場景的模型動態(tài)載入機制,大幅度的提高了模型的載入效率,減少了模型的內(nèi)存占用。并以最小二乘多項式擬合法對車輛的運動軌跡進行擬合與插值,實現(xiàn)了仿真軌跡的平滑過渡,仿真過程中,引入了車輛姿態(tài)動態(tài)調(diào)整機制,使得車輛的姿態(tài)能夠與實時仿真保持姿態(tài)同步,達到了較好的視景仿真效果。 論文對車路協(xié)同系統(tǒng)視景仿真平臺的予以實現(xiàn),完成了視景仿真平臺的基本功能。對車路協(xié)同仿真系統(tǒng)中的車車、車路信息交互等典型應(yīng)用場景從性能上和功能上驗證。視景仿真能夠?qū)⒋罅康臄?shù)據(jù)信息轉(zhuǎn)化為可視化的圖形信息,增強了車路協(xié)同系統(tǒng)仿真的效率和交互性,提高了車路協(xié)同系統(tǒng)的研制效率。
[Abstract]:The vehicle-road cooperative system (CVIS-CVIS) is a multi-disciplinary intersecting and fusion method, which uses advanced technologies such as large-scale parallel computing, sensor network and so on, to realize the intelligent perception of road traffic information as well as human, vehicle, and so on. The 3D visual simulation method combines computer technology, graphics and image technology, optical technology, control technology and so on. With the help of necessary equipment, users interact with the objects in the virtual environment in a natural way and interact with each other, which can obviously promote the rationality of system planning and the development efficiency. In this paper, the typical application of vehicle-vehicle and vehicle-road interaction is selected as the research object, and the scene simulation is applied to the field of vehicle-road collaborative simulation. The 3D scene simulation technology of the vehicle-road collaborative system is studied. The part of the vehicle-road collaborative visual simulation is integrated into one federate to simulate the visual simulation of the whole vehicle-road collaborative system. Based on the simulation of vehicle-road cooperative system and the visual simulation software of Multitgen Paradigm, the scene simulation model of local simulation traffic network is constructed, and the visual simulation model base is established. The multi-detail hierarchical model is used to optimize the model, and the multi-detail hierarchical model of pedestrian and vehicle is transformed to improve the rendering efficiency of the virtual simulation, aiming at the complex structure of the original model. The node structure optimization method based on function is adopted to optimize the node structure of the model to improve the searching efficiency of the model function node. With the help of virtual gloves and inertial sensor equipment, the interactive auxiliary driving platform is designed, which enables the simulation operator to control the vehicle auxiliary driving equipment in the bicycle simulation through the data gloves. In the aspect of optimization of simulation platform, the dynamic loading mechanism of the model based on scene is designed, which greatly improves the loading efficiency of the model. The memory footprint of the model is reduced, and the vehicle motion trajectory is fitted and interpolated by least square polynomial fitting method, which realizes the smooth transition of the simulation trajectory. In the simulation process, the vehicle attitude dynamic adjustment mechanism is introduced. The attitude of the vehicle can be synchronized with the real-time simulation, and the result of visual simulation is better. In this paper, the visual simulation platform of vehicle-road collaborative system is implemented, and the basic functions of the visual simulation platform are completed. Visual simulation can transform a large amount of data information into visual graphic information and enhance the efficiency and interaction of vehicle-road collaborative system simulation. The development efficiency of the vehicle-road cooperative system is improved.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U495

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