Adaptive Control of Milling Forces under Fractional Order Holds
This paper introduces a novel discrete-time model-reference based control of the tool-work-piece interaction force in a milling process. The novelty of the scheme relies on the use of a fractional order hold (FROH) instead of a traditional zero order hold (ZOH) used in the manufacturing literature to obtain a discrete-time model of the continuous system. The additional degree of freedom introduced by the FROH through its correcting gain allows the designer to improve the closed-loop behavior of the time-varying unknown system by an adequate choice of its value. Simulation examples showing the influence of the correcting gain in the closed-loop response are presented and compared.
KeywordsAdaptive Control Fractional Order Milling Force Tool Breakage Computerize Numerical Control
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- Altintas, I. Yellowley and J. Tlusty, “The Detection of Tool Breakage in Milling Operations”, Journal of Engineering for Industry, November 1988, Vol. 110.Google Scholar
- Y. Altintas, “Prediction of Cutting Forces and Tool Breakage in Milling from feed drive current measurements”, Journal of Engineering for Industry, pp.386-392, November 1992, Vol. 114.Google Scholar
- L.K. Lauderbaugh and A.G. Ulsoy, “Dynamic Modeling for Control of the Milling Process”, Journal of Engineering for Industry, November 1988, Vol. 110.Google Scholar
- L.K. Lauderbaugh and A.G. Ulsoy, “Model Reference Adaptive Force Control in Milling”, Journal of Engineering for Industry, February 1988, Vol. 111.Google Scholar
- Y. Altintas, “Manufacturing Automation”, Cambridge University Press, 2000Google Scholar
- A.Spence and Y. Altintas, “CAD Assisted Adaptive Control for Milling”, Transaction of the ASME, September 1991, Vol. 113.Google Scholar
- Y.Altintas, F. Sassani and F. Ordubadi, “Design and Analysis of Adaptive Controllers for Miling Process”, Transaction of the CSME, pp.17-25, no.1/2, 1990, Vol. 14.Google Scholar
- Y.Altintas and C.C.H. Ma, “Direct Adaptive Control of Milling Force”, IEEE International Workshop on Intelligent Motion Control, Istambul 20-22 August 1990.Google Scholar
- K.J. Astrom and B. Wittermark, “Adaptive Control”, $2nd$edition, Addison-Wesley, 1995.Google Scholar
- Ioannou, P. and Sun, J., “Robust Adaptive Control”, Pretince Hall 1996.Google Scholar
- S.S. Sastry and M. Bodson, “Adaptive Control: Stability, Robustness and Convergence”. Prentice 1989.Google Scholar