【作者】 首中华；

【导师】 李世其； 王峻峰；

【作者基本信息】 华中科技大学 ， 工业工程， 2007， 硕士

【摘要】 虚拟装配技术作为一种新技术在国内外得到了广泛的研究。该技术的使用可以缩短新产品的开发周期,减少新产品的开发成本。信息在虚拟装配中扮演着颇为重要的角色,虚拟装配场景中的信息提示,既可以引导用户进行虚拟装配,也可以对用户的操作进行反馈。本文在虚拟装配信息增强技术研究的基础上,开发出虚拟装配信息增强系统,力求能较大程度的推动虚拟装配技术的发展和应用。本文首先对虚拟装配过程中需要增强显示的信息进行分类,包括零件管理信息、零件几何信息、零件拓扑信息和装配工艺信息;采用层次信息模型对虚拟装配增强信息进行建模;采用基于元数据的信息管理方法对这些装配信息进行组织与管理。并依此建立虚拟装配增强信息数据库,支撑整个信息增强系统。然后,本文根据增强方式的不同,将各种虚拟装配增强信息归纳为文字信息和零件特征信息两种类型。根据文字信息的特点,提出文字模型、三维信息框以及文字贴图等三种增强方式;对于零件特征信息,研究了线面等零件特征的表示方法,采用面向对象的技术对这些特征信息进行封装,对不同的零件特征提出相应的增强方式。最后在Open Inventor平台上,用Access建立虚拟装配增强信息数据库,并用VC++ 6.0完成了虚拟装配信息增强系统的开发。采用一个示例装配体的虚拟装配作为实例进行验证,证明了系统的正确性和有效性。更多还原

【Abstract】 Virtual Assembly (VA) is a new technology that has been widely researched home and abroad. The use of this technology shortens the product development cycle and reduces the cost of new product development. In VA, information plays an important role. Information hints in the assembly environment can guide users to complete the virtual assembly and can feed back to users’ operation. To address this problem, this paper develops an Information-Rich Virtual Assembly Environment (IRVAE) based on the research of information-rich theory for VA.Firstly, this paper studies the information that requires enhancement display in the virtual assembly environment and classifies the assembly information into four categories which are part management information, part geometrical information, part topology information and assembly process information. Level Information Model is used to model the virtual assembly information. The information is managed in the information management method based on the metadata. According to the assembly information metadata structure, virtual assembly enhanced information database is built to support the whole information enhancement system.Secondly, this paper classifies the virtual assembly information into two types: text information and character information. According to the feature of text information, three enhancement methods are proposed: text model, 3D information box and word texture. For the character information, the representation of part features such as the line and plane is proposed and object-oriented technology is used to package the character information, and corresponding enhancement display methods are presented for different character types.Finally, on the Open Inventor platform, the virtual assembly information database is built with Microsoft Office Access, and the IRVAE is developed with VC++ 6.0. The accuracy and effectiveness of the system is proved with the instance of an assembly.更多还原