Title :
Advanced curve and surface design in CAD system using STEP
Author :
Ma Lizhuang ; He Zhijun ; Dong Jinxiang
Author_Institution :
State Key Lab. of CAD & CG, Zhejiang Univ., Hangzhou, China
Abstract :
In this paper, methods and techniques newly developed are presented for high-quality curve and surface modeling in CAD systems. The data structure and data exchange are based on STEP, the international standard for external representation of product data. While accurate algebraic representation is used for lower degree curves and surfaces, NURBS (Nonuniform Rational Bspline Surface) representation is adopted as a unified approach to advanced curve and surface design. We thus have both advantages for accurate shape processing in CAD/CAM and high-quality design of shapes with free-form surfaces.<>
Keywords :
CAD; CAD/CAM; curve fitting; data structures; electronic data interchange; splines (mathematics); standards; surface fitting; CAD system; CAD/CAM; NURBS; Nonuniform Rational Bspline Surface; STEP; accurate shape processing; algebraic representation; curve design; data exchange; data structure; free-form surfaces; international standard; lower degree curves; product data; surface design; surface modeling; CADCAM; Computer aided manufacturing; Computer displays; Data structures; Design automation; Design methodology; Helium; Marine vehicles; Shape control; Surface fitting;
Conference_Titel :
TENCON '93. Proceedings. Computer, Communication, Control and Power Engineering.1993 IEEE Region 10 Conference on
Conference_Location :
Beijing, China
Print_ISBN :
0-7803-1233-3
DOI :
10.1109/TENCON.1993.320056
