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TECHNICAL PAPERS

Surface Finish Enhancement in a Turning Operation via Adaptive STR Control of the Depth of Cut

[+] Author and Article Information
E. Liasi

Vehicle Operations, Ford Motor Company, Dearborn, MI 48121

W. P. T. North

Department of Mechanical Engineering, University of Windsor, Windsor, Ontario, Canada N9B 3P4

J. Manuf. Sci. Eng 125(2), 289-296 (Apr 15, 2003) (8 pages) doi:10.1115/1.1559155 History: Received August 01, 1999; Revised May 01, 2002; Online April 15, 2003
Copyright © 2003 by ASME
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References

Hwang,  C. L., and Chen,  B. S., 1990, “Constant Turning Force Adaptive Control Via Sliding Mode Control Design,” ASME J. Eng. Ind., pp. 308–312.
Jang,  D. Y., Jang,  M., and Seireg,  A. A., 1992, “Tool Natural Frequency as the Control Parameter for Surface Roughness,” Machine Vibration, pp. 147–154.
Liu,  L., Sinha,  N. K., and Elbestawi,  M. A., 1998, “Adaptive Control for Geometric Tracking in Turning,” Computers in Industry, pp. 147–159.
Tomizuka,  M., and Zhang,  S., 1988, “Modeling and Conventional/Adaptive PI Control of a Lathe Cutting Process,” ASME J. Dyn. Syst., Meas., Control, App. 350–354.
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Armarego, A., and Brown, J., 1969, The Machining of Metals, Prentice Hall.
Zhang,  G. M., and Kapoor,  S. G., 1991, “Dynamic Generation of Machined Surfaces, Part 1: Description of Random Excitation System,” ASME J. Eng. Ind., May, pp. 137.
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Usui,  E., and Hirota,  A., 1978, “Analytical Prediction of Three Dimensional Cutting Process-Part 2: Chip Formation and Cutting Force with Conventional Single Point Tool,” ASME J. Eng. Ind., 2, May, pp. 229–235.
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Åström,  K. J., and Wittenmark,  B., 1973, “On self-tuning regulators,” Automatica, 9, pp. 185–193.
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Iserman, R., Lachman, K. H., and Matko, D., 1992, Adaptive Control Systems, Prentice Hall, UK.

Figures

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Physical interpretation of tool workpiece relative displacement
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Dynamic model of the system
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Block diagram of the dynamic system
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(a) Surface micro-hardness distribution; (b) 3D surface micro-hardness variation
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(a) Force fluctuations and (b) cutting force profiles
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Self tuning state controller with state estimation
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(a) Actual depth of cut and (b) tool workpiece relative displacement (open loop response)
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Cross-section of the surface topography and 3D surface topography (open loop)
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(a) Actual depth of cut; (b) Tool-workpiece relative displacement adaptive control strategy (self-tuning regulator)
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Cross-section of the surface profile and 3D surface topography of the closed loop system-LQG self-tuning regulator

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