Various methods for parametric interpolation of 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 jerk-limited 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 when compared to previously proposed adaptive-feedrate and curvature-feedrate algorithms.
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ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis
July 12–14, 2010
Istanbul, Turkey
Conference Sponsors:
- International
ISBN:
978-0-7918-4919-4
PROCEEDINGS PAPER
Look-Ahead NURBS-PH Interpolation for High Speed CNC Machining Available to Purchase
Behnam Moetakef Imani,
Behnam Moetakef Imani
Ferdowsi University of Mashhad, Mashhad, Iran
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Amirmohammad Ghandehariun
Amirmohammad Ghandehariun
Ferdowsi University of Mashhad, Mashhad, Iran
Search for other works by this author on:
Behnam Moetakef Imani
Ferdowsi University of Mashhad, Mashhad, Iran
Amirmohammad Ghandehariun
Ferdowsi University of Mashhad, Mashhad, Iran
Paper No:
ESDA2010-24426, pp. 143-150; 8 pages
Published Online:
December 28, 2010
Citation
Moetakef Imani, B, & Ghandehariun, A. "Look-Ahead NURBS-PH Interpolation for High Speed CNC Machining." Proceedings of the ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, Volume 5. Istanbul, Turkey. July 12–14, 2010. pp. 143-150. ASME. https://doi.org/10.1115/ESDA2010-24426
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