TY - GEN
T1 - Real-time variable feedrate parametric interpolator for CNC machining
AU - Cheng, Chung Wei
AU - Tsai, Mi Ching
AU - Cheng, Ming Yang
N1 - Funding Information:
The author is grateful to the National Science Council of the Republic of China for supporting this research under the grant NSC89-2212-E-006-110.
Publisher Copyright:
Copyright © 2002 IFAC.
PY - 2002
Y1 - 2002
N2 - This study explores the feasibility of variable feedrate parametric interpolators for real-time motion command generation using a digital signal processor (DSP). Most of the existing parametric interpolators are developed for a constant federate due to the computational complexity. However in certain applications, in order reduce the deterioration in accuracy of machining, feedrate commands should be performed in advance to overcome excessive acceleration/deceleration of CNC machines. The aim of this study is to develop a real-time parametric interpolator with variable federate where acceleration/deceleration planning on the feedrate command is performed before the interpolation takes place. This approach that would provide new capabilities for advanced CAD/CAM systems, can compensate for the path command error caused by the acceleration/deceleration after interpolation. To justify the performance of the real-time control interpolator, an X-Y table driven by two servomotors is controlled to track a parametric curve represented in non-uniform rational B-Spline (NURBS) form.
AB - This study explores the feasibility of variable feedrate parametric interpolators for real-time motion command generation using a digital signal processor (DSP). Most of the existing parametric interpolators are developed for a constant federate due to the computational complexity. However in certain applications, in order reduce the deterioration in accuracy of machining, feedrate commands should be performed in advance to overcome excessive acceleration/deceleration of CNC machines. The aim of this study is to develop a real-time parametric interpolator with variable federate where acceleration/deceleration planning on the feedrate command is performed before the interpolation takes place. This approach that would provide new capabilities for advanced CAD/CAM systems, can compensate for the path command error caused by the acceleration/deceleration after interpolation. To justify the performance of the real-time control interpolator, an X-Y table driven by two servomotors is controlled to track a parametric curve represented in non-uniform rational B-Spline (NURBS) form.
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U2 - 10.3182/20020721-6-es-1901.00021
DO - 10.3182/20020721-6-es-1901.00021
M3 - Conference contribution
AN - SCOPUS:84945553828
SN - 9783902661746
T3 - IFAC Proceedings Volumes (IFAC-PapersOnline)
SP - 109
EP - 114
BT - IFAC Proceedings Volumes (IFAC-PapersOnline)
A2 - Ferrate, Gabriel
A2 - Camacho, Eduardo F.
A2 - Basanez, Luis
A2 - de la Puente, Juan. A.
PB - IFAC Secretariat
T2 - 15th World Congress of the International Federation of Automatic Control, 2002
Y2 - 21 July 2002 through 26 July 2002
ER -