基于约束的CAD技术研究

对ＣＡＤ技术中约束的表达及处理方法进行了研究，提出将约束从两个角度予以划分，并将多个视图中的尺寸变量约束自动关联起来；提出产品可以由参数和匐中以描述，给出了基于约束的产品定义的形式；提出并建立了基于约束的ＣＡＤ系统一般针人的智能及系统的智能有机地结合起来，增加了产品设计的灵活性和准确性。

Research on CAD Technology Based on Constraints

The method of handling the constraints in CAD is researched. It is proposed that the constraints can be divided from two prospects, and the dimension variants of multi-view are automatically associated, thus the constraints can completely reflect the product information. It is proposed that products can be expressed by parameters and constraints, and the method of building the product model based on constraints is given. The general construction of CAD system based on constraints is built, and the human intelligence and the computer intelligence are combined, thus the flexibility and accuracy of product design are increased.