基于Multigen Creator与Vega Prime的车辆碰撞事故视景仿真研究

发布时间：2019-03-07 22:36

【摘要】：汽车交通是由人、汽车和环境构成的一个复杂的系统。只有这三个要素协调工作,才能使这个系统充分发挥安全机能。在由人—车—路组成的交通系统中,只要汽车仍有人来驾驶,就仍可能发生交通事故,因此探究交通事故产生的原因是一个复杂的问题。虚拟现实技术具有可视化、人机交互、可重复性、低成本等特点,利用虚拟现实技术,可以对交通事故这一复杂事件进行深入直观的再现,因此可以为研究交通事故发生的原因提供一个方便、高效的手段。本文以车辆碰撞事故为研究对象,以Multigen Creator三维建模软件和Vega Prime实时驱动软件为平台,建立车辆碰撞事故视景仿真系统,实现车辆虚拟漫游与碰撞事故的再现。本文主要内容如下所示:1.采用Multigen Creator软件实时可视化三维建模软件,对汽车和事故现场环境分别建立三维模;分析场景的建模过程,并深入研究Multigen Creator软件的建模关键技术及优化技术,从而平衡视景仿真系统的实时性和逼真性。2.根据车辆事故现场图和事故鉴定报告,利用Matlab工具的多项式拟合算法,对车辆碰撞后的运行轨迹进行拟合,得出车辆碰撞过程中运动轨迹上各个位置点的坐标,为车辆碰撞再现提供车辆行驶数据。3.使用Vega Prime实时仿真软件,在Lynx Prime界面中构建系统的初始框架,研究虚拟场景的构建、碰撞的检测、视点的变换等;利用Lynx Prime的Path Tool模块建立车辆行驶路线,使不同车辆按不同路线同时行驶,并实现碰撞响应。
[Abstract]:Automobile traffic is a complex system composed of people, cars and environment. Only by coordinating the three elements can the system make full use of its security functions. In the human-vehicle-road traffic system, traffic accidents may still occur as long as the car is still driven by people. Therefore, it is a complex problem to explore the causes of traffic accidents. Virtual reality technology has the characteristics of visualization, human-computer interaction, repeatability, low cost and so on. Using virtual reality technology, the complex event of traffic accident can be reproduced in depth and intuitively. Therefore, it can provide a convenient and efficient means to study the causes of traffic accidents. In this paper, taking vehicle collision accident as the research object, taking Multigen Creator three-dimensional modeling software and Vega Prime real-time driving software as the platform, the visual simulation system of vehicle collision accident is established to realize the reproduction of vehicle virtual roaming and collision accident. The main contents of this article are as follows: 1. The real-time visualization three-dimensional modeling software of Multigen Creator software is used to establish the three-dimensional model of automobile and accident scene environment respectively. In order to balance the real-time and fidelity of scene simulation system, the modeling process of scene is analyzed, and the key technology and optimization technology of Multigen Creator software are deeply studied in order to balance the real-time and fidelity of scene simulation system. According to the scene diagram of vehicle accident and accident appraisal report, by using the polynomial fitting algorithm of Matlab tool, the running trajectory of vehicle after collision is fitted, and the coordinates of each position on the track of vehicle collision are obtained. Provision of vehicle travel data for vehicle collision reproduction. 3. Vega Prime real-time simulation software is used to construct the initial frame of the system in the Lynx Prime interface, to study the construction of virtual scene, collision detection, viewpoint transformation and so on. The Path Tool module of Lynx Prime is used to set up the vehicle route, so that different vehicles can travel at the same time according to different routes, and the collision response can be realized.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491.3;TP391.9

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