Title :
Reverse CAD Modeling of Automobile Cam Based on Extended Interpolation Method
Author :
Zhong Shan ; Yang Yongqiang
Author_Institution :
Sch. of Mech. & Automotive Eng., South China Univ. of Technol., Guangzhou, China
Abstract :
When doing reverse CAD modeling of a high precision automobile cam profile, we utilize a new kind of extended interpolation method to construct the extended approaching model by using the scattered measured points of a non-circular curved surface. To validate the design effect, the Cubic spline interpolation method and the piecewise fitting method are used to calculate the interpolation points of the non-circular surface of the design cam, respectively. The comparison result shows that when we use the extended interpolation method to realize the profile design of non-circular curved surface of the cam with scattered measured points, in the case of the boundary points satisfy the interpolation conditions in extended area, we can realizes the best fitting in the inner area. In addition, extended interpolation method possesses higher design accuracy under the same conditions of the interpolation power order.
Keywords :
CAD; cams (mechanical); engines; interpolation; mechanical engineering computing; production engineering computing; reverse engineering; splines (mathematics); boundary points; cubic spline interpolation method; design effect; extended approaching model; extended interpolation method; high precision automobile engine cam profile; noncircular curved surface; piecewise fitting method; reverse CAD modeling; Automobiles; Automotive engineering; Curve fitting; Design automation; Interpolation; Scattering; Spline; Surface fitting; Surface reconstruction; Surface treatment;
Conference_Titel :
Measuring Technology and Mechatronics Automation (ICMTMA), 2010 International Conference on
Conference_Location :
Changsha City
Print_ISBN :
978-1-4244-5001-5
Electronic_ISBN :
978-1-4244-5739-7
DOI :
10.1109/ICMTMA.2010.404
