面向低压配电仿真的虚拟化身技术的研究和实现

【作者】 张萌；

【导师】 李蔚清； 吴慧中；

【作者基本信息】 南京理工大学 ， 模式识别与智能系统， 2008， 硕士

【摘要】 虚拟化身技术是近年来虚拟现实领域的研究热点。随着研究的不断深入,被广泛地应用于工程、虚拟会议、交互、监控、虚拟环境、游戏、训练、教育、军事训练、产品的设计和维护等领域。本文研究了如何将虚拟化身技术和虚拟装配技术相结合,并将其应用于低压配电系统仿真培训之中。本文首先研究了虚拟人几何建模技术,并分析了面向低压配电仿真的虚拟化身模型应该具有的特点,据此提出了一种适用于低压配电仿真的层次化建模方法,利用我们提出的层次化建模方法建立了虚拟化身的几何模型。本文分析了人体的运动原理和虚拟化身的手部运动约束,采用关键帧动画的方法建立了虚拟化身的相关动作模型。为了使虚拟化身的动作便于控制,本文提出了一种基于优先级划分的动作序列编排的方法,并采用骨架子空间变形法处理了两个不同优先级动作混合时虚拟化身关节处皮肤发生的形变,能够使虚拟化身的动作更加灵活,让虚拟化身显得更加人性化。本文接着研究了配电设备装配和操作规则,并归结为约束条件保证虚拟化身装配工作的正确性。本文采用装配序列规划的方法以满足装配过程中的工艺约束。如何把虚拟化身技术和虚拟装配技术结合起来,让虚拟化身在低压配电仿真环境中实现对电力设备的使用和装配是本文重点研究的内容。为解决这个问题,本文提出了一种对于虚拟化身操作步骤建模的方法,它能够把生成的装配序列映射到虚拟化身的操作步骤中,让虚拟化身按照装配序列的顺序进行装配工作,较好地把虚拟化身和虚拟装配技术结合在一起。为了让虚拟化身的手部在装配过程中能够实现快速抓取,保证仿真的实时性,本文还分析了手部抓持的理论,并提出了适合于低压配电仿真环境的手部抓取规则。本文在windows环境下,基于VC2005.NET平台,运用Delta3D图形图像开发工具包,根据我们提出的操作步骤建模的方法,实现了虚拟化身在低压配电仿真环境下对于电力设备的装配和使用,很好的把虚拟化身技术和虚拟装配技术结合在一起。为电力系统仿真培训,特别是低压配电系统的仿真培训提供了一个新的方向。更多还原

【Abstract】 Virtual avatar is one of the forefront of disciplines, which is strong synthesis and challenging . With the continuous deepening of research in recent years, it has been widely used in engineering, virtual meetings, interactive, monitoring, virtual environment, games, training, education, military training, product design and maintenance, and other fields. The paper studies the combination of virtual avatar technology and virtual assembly technology, and applied to low-voltage power system of simulation training.This paper studies the virtual human geometric modeling methods and analysis in the face of low-voltage power simulation model should be the virtual embodiment of the characteristics. We present a Layered modeling methods which apply to low-voltage power simulation well and use the Layered modeling methods to establish a virtual embodiment of the geometric models. This paper then analyze the body’s movement and tne principle of the hand movements constrained, and adopt the key frame method to establishment the relevant action model of virtual avatar. In order to make the action of virtual avatar easy for control, i use a action sequences scheduling methods based on priority and use the Skeletal Subspace Deformation(SSD) to deal with the deformation of the skin when two different priority action were mixed, which can make our virtual avatar work well. How to combine the virtual avatar and virtual assembly technology is the focus on the content of this article. Analysis of the virtual worker for the key elements of virtual assembly, i use a virtual avatar on the steps of modeling methods and achieving the low- power simulation environment for the virtual assembly of electrical equipment, combing virtual avatar and virtual assembly well . To allow the hand of virtual avatar in the assembly process to achieve rapid crawl, and ensure the real-time simulation , the paper analyze the hand grasping the theory and made suitable for the simulation environment in our hands to crawl rules.Finally, we test and verify our method under Windows VC2005.NET platform, using Delta3D SDK. The result demonstrate that our methods work well on combining virtual avatar and virtual assembly technology. For power system simulation training, in particular low-voltage distribution system of simulation training to provide a new direction, with far-reaching applications.更多还原