International Journal of Advanced Manufacturing Technology, ( ISI ), Volume (56), No (5), Year (2011-8) , Pages (619-629)

Title : ( Real-time PH-based interpolation algorithm for high speed CNC machining )

Authors: Behnam Moetakef Imani , Amir Ghandehariun ,

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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 lookahead 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.

Keywords

Numerical control . CNC interpolation . PH curve
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@article{paperid:1023186,
author = {Moetakef Imani, Behnam and Ghandehariun, Amir},
title = {Real-time PH-based interpolation algorithm for high speed CNC machining},
journal = {International Journal of Advanced Manufacturing Technology},
year = {2011},
volume = {56},
number = {5},
month = {August},
issn = {0268-3768},
pages = {619--629},
numpages = {10},
keywords = {Numerical control . CNC interpolation . PH curve},
}

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%0 Journal Article
%T Real-time PH-based interpolation algorithm for high speed CNC machining
%A Moetakef Imani, Behnam
%A Ghandehariun, Amir
%J International Journal of Advanced Manufacturing Technology
%@ 0268-3768
%D 2011

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