Contour error control of CNC machine tools with vibration avoidance

A vibration avoidance and contouring error compensation algorithm for feed drives is presented. The residual vibrations are avoided by applying input shaping filters on the reference axis commands. The input shaping filter avoids the excitation of the structural modes but at the expense of increasin...

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Bibliographic Details
Published in:CIRP annals 2012, Vol.61 (1), p.335-338
Main Authors: Altintas, Y., Khoshdarregi, M.R.
Format: Article
Language:English
Subjects:
Algorithms
Applied sciences
Avoidance
Compensation
Contouring
Drive
Error
Error compensation
Errors
Exact sciences and technology
Input shaping
Mechanical engineering. Machine design
Tracking errors
Vibration
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Description
Summary:A vibration avoidance and contouring error compensation algorithm for feed drives is presented. The residual vibrations are avoided by applying input shaping filters on the reference axis commands. The input shaping filter avoids the excitation of the structural modes but at the expense of increasing tracking and contouring errors. The tracking errors are estimated from the closed loop transfer function of drives, and used to predict the contouring errors which are mapped to the each axis for pre-compensation. The integrated vibration avoidance and contouring error compensation is experimentally demonstrated to improve the damping and contouring accuracy on a two-axis table.
ISSN:0007-8506
DOI:10.1016/j.cirp.2012.03.132