Application research of iterative minor adjustment in reverse engineering

Since the high-precision error control is very important in reserve engineering, this paper presents a method of Bezier curves iterative minor adjustment based on control points standard, according to the basic requirements of high-precision and smoothness on auto A-class surfaces characteristic curves. This method aims to optimize the figures by changing to NURBS surface using surfaces back-calculation, and modifying surfaces based on minimizing the bending energy of surfaces. The core of the method is the minor adjustment calculation of control vertex and the surfaces modification based on minimizing bending energy of surfaces. The method not only realizes fair fitting of the space points and fast convergence of iterative fitting process, but also the automatic process of surface minor adjustment and surfaces modification. The complex surface obtained from reverse engineering not only meets the precision requirement, but also the aesthetic design. The paper combines point-cloud data examples of A-class surfaces, and shows that applying iterative minor adjustment can improve the efficiency and accuracy of generating CAD data.