面向对象的智能化CAD系统的研究与开发

【作者】 庞云玲；

【导师】 肖放；

【作者基本信息】 天津工业大学 ， 机械设计及理论， 2004， 硕士

【摘要】 计算机辅助设计(CAD，Computer Aided Design)是一种利用计算机辅助设计人员进行快速、高效、高质、低成本、方便地完成产品设计任务的现代设计技术。我国CAD应用基本还在“甩图板”阶段，即初级普及CAD阶段，同时又面临着全球网络化、信息化新的挑战，用户未来的发展需求对我们现在CAD产品、软件企业和应用水平都提出了新的要求，用户不但要求集成CAD／CAE／CAM／CAPP／PDM等一系列配套软件产品，在软件的开发方面提出了用户方便性和软件智能化与功能性并重的要求。在这种发展趋势之下，我们提出了“面向对象的智能化CAD系统的研究与开发”，通过构建一个开放的、实用的、面向对象的智能CAD框架，实现企业零件设计的智能化，并为企业提供了信息集成的有效手段，以推进CAD技术在国内的进一步应用和先进设计技术在现代制造业中的应用。 本文着重研究了以下内容： 1．基于国内外现有CAD软件技术及其在国内企业中应用现状，提出了面向对象的智能化CAD系统模型；在现有CAD系统应用基础之上，以实际企业为例，研究建立了企业产品零件设计的参数化环境； 2．运用人机交互技术，基于CAD软件系统，探索了人机交互式智能化零件设计平台的开发策略； 3．并在此基础之上探索了基于知识工程(KBE)技术的CAD系统，达到了零件设计自动化、智能化的目的，为实用型智能化CAD系统提出了解决方案。 另外，对以下内容也做了研究、介绍： 1．针对系统扩充性和集成性，探索了二次开发程序模块化的数据处理系统，对已有CAD二次开发系统的局限性提出了解决方案； 2．研究了程序开发中数据建模、库表结构设计与维护技术，应用了先进的基于IDEFO、IDEF1x系统功能模型和信息模型建模方法； 3．针对现状、以国内企业的实际环境为应用背景，开发了FJCAD系统。 本文主要思想是引入先进技术思想、提出既有针对性又有通用性的面向对象的智能化CAD系统思想，推进了CAD技术在国内的进一步推广应用。最后，笔者基于实践中遇到的问题和对相关理论的分析，提出了一些新的设想思路。更多还原

【Abstract】 Computer Aided Design(CAD),is a kind of modern design technology that helps designers to finish production design assignment speediness,high speed,high quality,low cost.The application of CAD of our country is at primary prevalence stage ,and at the same time faces to the challenge of global networking and informationing.The developing requirement of users puts forword new requests of the CAD production, software enterprise and application level.Users not only require integration CAD/CAE/CAM/CAPP/PDM and so on ,but also puts forword the request on the aspect of deleveloping software ,that is the same essentiality of convenience of users and intelligentize,functionality,leveling.On this developing tendency,put forword "The research and development of the object-oriented intelligentize CAD system",by conceiving a opening,applied,object-oriented CAD system,realize the intelligentizing of designing parts,to provide effective measure of integration of information.And aims to push the application of CAD technology at home and the application of advanced design technology in modern manufacturing.This paper emphasize the following content:1.Based on summing up and analyzing the developing and applicating actuality of the CAD system,studies following content:based on the CAD software technology in existence worldwide and its application in the domestic enterprise now,the penman put forward the model of Object-Oriented Intellectualized CAD system;2.On the basis of application of existing CAD system,aiming at actual instance ,and take the factual corporation as example,research and build the parametered circumstance of products and parts design in corporations;3.Exerting human-computer interactive technology,based on the thought of realizing factual part-designed function, study the developed strategy of human-computer interactive intellectualized part-designed flat roof;4.Explore the Knowledge Based Engineering CAD system, aiming to automatization and intellectualized parts design,and advance resolvent of practiced intellectualized CAD system.On the other hands,the auther also studies and illuminate these:1.Aiming at the expansibility and integrating of systems,explore modularization data-deposed system of development program,solve the expansed problem of systems,bring forward resolvent of the localizated feature of existed CAD development system;2.Study data-modeling,structure-designed and maintenance technology of databases and tables.Apply modeling method of system function-model and information-model based on the advanced IDEFO, IDEF1x;3.Aiming at actuality,taking actual envirnoment of domestic corporations applied background develop FJCAD system.The paper put forward the thought of the Object-Oriented Intellectualized CAD system,haved pertinency and currency ,introducing advanced thechnologythought ,pushing forward more popularization and application of CAD technology in China.At last,based on problem met in practice and the analyse of the relative theory,the author put forward some new imagine.更多还原