文档介绍：华中科技大学
硕士学位论文
基于参数化设计的智能CAD开发平台的研究与开发
姓名:徐小红
申请学位级别:硕士
专业:机械制造及其自动化
指导教师:陈卓宁;严晓光
20050416
摘要
随着 CAD 软件的应用不断深化通用 CAD 系统存在的不足逐渐暴露出来主要
体现在以下两个方面第一同类产品的设计过程中存在大量重复性工作另一方面
缺乏对产品设计过程中决策性工作的支持
为了解决以上问题本文研究和开发了基于参数化设计的智能 CAD 技术和系统
该系统用于设计特定的产品它不但具有智能设计能力还具有自动生成图形的能力
前者能给产品设计过程中的决策工作提供支持后者则可以把设计人员从繁重的绘图
工作中解脱出来智能设计功能通过知识库系统实现知识库系统以知识库推理
机架构构建它应用知识推理技术进行推理从而实现智能设计其中知识库由
抽象化的产品设计知识构成推理机是通过调用知识库中的知识进行推理的机构图
形自动生成功能由专门的图形生成系统实现该系统采用根据模板生成图形和程序绘
图两种生成图形的方法实现所有设计文档的输出
为了缩短智能 CAD 系统的开发周期建立了基于参数化设计的智能 CAD 开发平
台利用该平台可以快速开发出针对特定产品设计的智能 CAD 系统开发过程分为两
步首先根据用户需求归纳出产品设计知识并加入到知识库中然后完成图形生成
系统的开发使得系统能够输出用户要求的结果通过这种方法以该开发平台为基
础开发出了基于 KMCAD2003 的哈空调管束智能 CAD 系统 HKTCAD
关键字 CAD 参数化智能设计知识推理知识库
I
Abstract
As the application of CAD software is deepened, the deficiency of the traditional CAD
system has been exposed gradually. First, a large amount of work is done repeatedly in the
design process of the similar product; on the other hand, the support to design is insufficient
in the design process of products.
In order to solve the above problems, this thesis researches and develops an intellectual
CAD technology and system based on parametric design which is used for developing
intellectual CAD system for the design of a specific product. This intellectual CAD system
not only has ability of intelligent design but also has ability to produce the figure
automatically. The former can provide support for designing products; and the latter can free
the designer from the tedious repeat drafting operations. The function of intelligent design
can be realized through using the knowledge base system which is structured on "knowledge
base + reasoning machine" and carry on reasoning via knowledge reasoning technology for
intelligent design. The knowledge base prised of abstract products design knowledge,
and the reasoning machine is a mechanism carrying on reasoning in terms of the knowledge
in the knowledge base. Function of producing the fig