10th Biennial Conference on Engineering Systems Design and Analysis ESDA2010 , 2010-07-12

Title : ( LOOK-AHEAD NURBS-PH INTERPOLATION FOR HIGH SPEED CNC MACHINING )

Authors: Behnam Moetakef Imani , Amirmohammad Ghandehariun ,

Citation: BibTeX | EndNote

Abstract

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.

Keywords

, Numerical control, Intrepolator, PH Curve
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@inproceedings{paperid:1015797,
author = {Moetakef Imani, Behnam and Ghandehariun, Amirmohammad},
title = {LOOK-AHEAD NURBS-PH INTERPOLATION FOR HIGH SPEED CNC MACHINING},
booktitle = {10th Biennial Conference on Engineering Systems Design and Analysis ESDA2010},
year = {2010},
keywords = {Numerical control; Intrepolator; PH Curve},
}

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%0 Conference Proceedings
%T LOOK-AHEAD NURBS-PH INTERPOLATION FOR HIGH SPEED CNC MACHINING
%A Moetakef Imani, Behnam
%A Ghandehariun, Amirmohammad
%J 10th Biennial Conference on Engineering Systems Design and Analysis ESDA2010
%D 2010

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