摘要
针对反求工程中基于初始测量点直接构造的三角 Bézier曲面难以对曲面特征进行正确描述的问题 ,提出了一种通过局部重采样技术重构曲面特征的方法。从原三角曲面中提取并分离重采样区域 ,基于区域内测量点拟合 B样条曲面 ,在垂直过渡特征脊线的截面轮廓线上均匀重采样 ,重新三角化后即可以构造具有良好品质的曲面特征。实例表明提出的方法可以明显改善曲面局部特征的品质。
This paper describes a new approach for blend surface feature reconstruction,which improves the quality of triangular Bézier patch.It is composed of three steps. Firstly blend region within the original surface is defined and extracted. Secondly least square(LSQ) fitting to get a B-spline surface is performed.And new points are sampled on the circle profile around the spline curve of the extracted blend. Finally local surface with improved quality is reconstructed by triangulation.Example is given to show the efficiency of this approach.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2003年第19期1670-1673,共4页
China Mechanical Engineering
基金
国家 8 63高技术研究发展计划资助项目 (863 -5 11-942 -0 18)
高等学校博士学科点专项基金资助项目(980 3 3 5 3 2 )
