参数化CAD系统的关键技术研究  

Study on Key Techniques of Parametric Design System

作　　者：石峰[1] 张永清[1] 娄臻亮[1] 

机构地区：[1]上海交通大学,上海200030

出　　处：《工程图学学报》2001年第2期7-14,共8页Journal of Engineering Graphics

摘　　要：对参数化CAD系统的几个关键问题进行了研究。提出了一种通用的曲线拟合方法——基于BP网络的曲线拟合法，利用开放数据库连接访问和控制标准件特征参数数据库，在参数化模型的尺寸驱动中，采用普通算法而非人工智能实现几何推理。在此基础上开发了面向对象的参数化设计系统，并通过一个实例验证了此方法的有效性。In this paper several key techniques of parametric design system are investigated. A curve fitting method based on BP neural net is introduced. The ODBC(open database connectivity) is applied to access and control the feature parameter database of the standard parts. In the dimension-drive of the parametric model geometric reasoning is accomplished by a general algorithm rather than by expert system. An object-oriented parametric design system is developed and the validity of the methods above is testified.

关 键 词：BP神经网络 参数化设计 尺寸驱动 开放数据库连接 CAD 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术]