We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Real-time PH-based interpolation algorithm for high speed CNC machining.
- Authors
Moetakef Imani, Behnam; Ghandehariun, Amirmohammad
- Abstract
Various methods for parametric interpolation of non-uniform rational B-spline (NURBS) curves have been proposed in the past. However, the errors caused by the approximate nature of the NURBS interpolator were rarely taken into account. This paper proposes an integrated look-ahead algorithm for parametric interpolation along NURBS curves. The algorithm interpolates the sharp corners on the curve with the Pythagorean-hodograph (PH) interpolation. This will minimize the geometric and interpolator approximation errors simultaneously. The algorithm consists of four different modules: a sharp corner detection module, a PH construction module, a feedrate planning module, and a dynamics module. Simulations are performed to show correctness of the proposed algorithm. Experiments on an X- Y table confirm that the developed method improves tracking and contour accuracies significantly compared to previously proposed algorithms.
- Subjects
NUMERICAL control of machine tools; HIGH-speed machining; INTERPOLATION; PYTHAGOREAN-hodograph curves; ALGORITHMS; ERRORS; APPROXIMATION theory
- Publication
International Journal of Advanced Manufacturing Technology, 2011, Vol 56, Issue 5-8, p619
- ISSN
0268-3768
- Publication type
Article
- DOI
10.1007/s00170-011-3200-2