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1518 JOURNAL OF COMPUTERS, VOL. 8, NO. 6, JUNE 2013
Figure 14. The contour error when adopting the introduced contour
error coupled-control approach based on curve interpolation
VII. CONCLUSIONS
The CNC machine tools contour error coupled-control
strategy based on line interpolation and curve
interpolation is developed in the paper, which is with
stable calculation error, high computing precision and
satisfied real-time characteristic.
For one thing, bring forward the contour error
computing model based on line interpolation and the
contour error computing model based on curve
interpolation; For another thing, add the obtained contour
error to the following error of current sampling period,
and send the results to CNC PID position controller to
calculate position controlled quantity. The contour error
compensation control experimentation results show that
the developed approach can reduce contour error
effectively and enhance profile precision further.
ACKNOWLEDGMENT
The authors are grateful to the Project of the National
Natural Science Foundation of China (No. 51105236),
and the Shandong Province Promotive research fund for
excellent young and middle-aged scientists of China
(No.BS2011ZZ014).
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