基于网络协同设计的CAD异构数据共享研究

发布时间：2018-05-07 18:40

本文选题：协同设计 + 数据转换　；参考：《河南科技大学》2012年硕士论文

【摘要】：随着网络技术和制造业的融合，传统制造业有了质的飞跃。制造业的全球化、网络化促使了企业间的跨地域合作。网络化协同设计为异地设计人员提供了一个协同设计的平台，从而缩短了产品的设计周期，减少了设计成本，提高了产品的设计效率。通过网络协同设计，企业可以提升自身的快速响应能力和创新能力，提高自身的市场竞争力。异地异构CAD数据之间的转换成为协同设计发展急需解决的关键问题之一。STEP（ISO10303）即产品模型数据交换标准，是一个描述怎样表达和交换数字化产品信息的ISO标准。STEP提供一种不依赖于具体系统的中性机制来描述产品全生命周期中的产品数据信息。STEP中性文件的可读性差，文件数据量大，不利于网络传输和发布。XML具有良好的网络适应性和传输优势。本文研究了网络协同设计的服务功能，，利用分布式协同技术搭建网络协同设计平台门户系统，并在此基础上开发了STEP/XML数据转换系统，实现了STEP数据到XML数据的转换及其逆向转换，从而完成协同设计成员间异构数据交换。本文基于STEP AP203协议，对STEP中性文件建模语言EXPRESS和XML之间的映射关系进行了研究。通过对STEP中性文件实体数据的提取，根据EXPRESS和XML之间的映射关系，实现STEP文件向XML文件的转换。根据STEP AP203建立相对应的XML Schema模式，该模式对转换后的XML文件的有效性进行验证，然后对其进行网络上的传输和发布。通过XML DOM解析器，解析出XML文件中以STEP实体、属性为结点的结点树。DOM结点树中的信息再通过赋值生成STEP中性文件，从而实现STEP文件到XML文件的逆向转换。课题的研究为今后网络协同设计技术探索了新途径，其研究内容具有一定的理论及实际应用价值。
[Abstract]:With the integration of network technology and manufacturing industry, the traditional manufacturing industry has made a qualitative leap. The globalization of manufacturing industry and networking promote the cross-regional cooperation among enterprises. Networked collaborative design (NCD) provides a platform for collaborative design for remote designers, which shortens the design cycle, reduces the design cost and improves the efficiency of product design. Through network collaborative design, enterprises can improve their ability of rapid response and innovation, and improve their market competitiveness. The conversion between heterogeneous CAD data becomes one of the key problems that need to be solved in the development of collaborative design. STEPISO10303) is the standard of product model data exchange. Step is a ISO standard that describes how to express and exchange digital product information. Step provides a neutral mechanism that does not depend on a specific system to describe product data information. Step neutral files throughout the life cycle of products have poor readability and large amount of file data. It is not conducive to network transmission and publishing. XML has good network adaptability and transmission advantages. In this paper, the service function of network collaborative design is studied, and the portal system of network collaborative design platform is built by using distributed collaborative technology. On this basis, the STEP/XML data conversion system is developed. The conversion of STEP data to XML data and its reverse conversion are realized, so that the heterogeneous data exchange among the members of collaborative design is completed. Based on STEP AP203 protocol, the mapping relationship between STEP neutral file modeling language EXPRESS and XML is studied in this paper. By extracting the entity data of STEP neutral file, according to the mapping relationship between EXPRESS and XML, the conversion from STEP file to XML file is realized. According to the STEP AP203, the corresponding XML Schema mode is established, which verifies the validity of the transformed XML files, and then transmits and publishes them on the network. Through the XML DOM parser, the information in the node tree. Dom node tree with STEP entity and attribute as the node in the XML file is parsed, and then the STEP neutral file is generated by assignment, which realizes the reverse transformation from the STEP file to the XML file. The research provides a new way for network collaborative design technology in the future, and its research content has certain theoretical and practical application value.
【学位授予单位】：河南科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH122

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