A new experimental approach to identify the cutting dynamics in turning operations is presented. This method treats the problem as a closed-loop gray-box identification problem and is based upon spectral analysis and least squares estimation techniques. An active magnetic bearing is employed both to excite the system and to increase the tool’s damping. The inherent time delay of the cutting process is “removed” in identification by limiting the observation period to less than one revolution period of the workpiece. The coefficients of several cutting tests were identified. The methodology was validated by predicting the critical depth of cut from the identification results and comparing with the experiment result measured from a cutting test.
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November 2005
Technical Papers
A New Approach to the Estimation of Cutting Dynamics Using Active Magnetic Bearings
Min Chen,
Min Chen
Department of Mechanical and Aerospace Engineering,
University of Virginia
, Charlottesville, VA 22903
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Carl R. Knospe
Carl R. Knospe
Department of Mechanical and Aerospace Engineering,
e-mail: crk4y@virginia.edu
University of Virginia
, Charlottesville, VA 22903
Search for other works by this author on:
Min Chen
Department of Mechanical and Aerospace Engineering,
University of Virginia
, Charlottesville, VA 22903
Carl R. Knospe
Department of Mechanical and Aerospace Engineering,
University of Virginia
, Charlottesville, VA 22903e-mail: crk4y@virginia.edu
J. Manuf. Sci. Eng. Nov 2005, 127(4): 773-780 (8 pages)
Published Online: February 13, 2005
Article history
Received:
January 22, 2004
Revised:
February 13, 2005
Citation
Chen, M., and Knospe, C. R. (February 13, 2005). "A New Approach to the Estimation of Cutting Dynamics Using Active Magnetic Bearings." ASME. J. Manuf. Sci. Eng. November 2005; 127(4): 773–780. https://doi.org/10.1115/1.2034509
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