利用曲线面变形提取产品形态体特征的方法研究
An Approach to Extract the Product Shape Features by Using Variant Design of Curves and Surfaces

在变形设计理论的基础上，提出了将产品主体形态分解为子形态。研究了基于超椭圆方程和三次带参均匀B样条曲线构造技术提取影响产品艺术风格子形态横截面造型特征的方法，并结合曲面构造变形技术实现产品形态体特征的提取。以电动手工具为例研究了产品形态体特征提取与形态优化设计效果，得出超椭圆方程提取算法参数少，可较好地提取对称图形、非倒角图形的造型特征；基于三次带参均匀B样条曲线构造技术的算法参数较多，可较好地提取多种图形。
Based on the variant design theory, a new method by using super elliptic equations and cubic uniform B-spline construction technology to extract the sub-form's cross-sectional shape features was presented. Combining with the variant design of curved surfaces, the effects of extraction and shape optimization design were proved by an electric hand tool design case. The results were showed in the contrast research that the super elliptic extraction algorithm has less parameters, which is simple and can better extract the symmetric figure and chamfering graphics features. The cubic uniform B-spline algorithm has more parameters. Although it is a little complicated, it can be better used in extracting a variety of graphics and has wide adaptation