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TECHNICAL PAPERS

Adaptive Compensation of Sensor Runout for Magnetic Bearings With Uncertain Parameters: Theory and Experiments

[+] Author and Article Information
Joga D. Setiawan, Ranjan Mukherjee

Department of Mechanical Engineering, 2555 Engineering Building, Michigan State University, East Lansing, MI 48824-1226

Eric H. Maslen

Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, VA 22903

J. Dyn. Sys., Meas., Control 123(2), 211-218 (Sep 27, 1999) (8 pages) doi:10.1115/1.1369362 History: Received September 27, 1999
Copyright © 2001 by ASME
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References

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Figures

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A magnetic bearing system with sensor runout
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Block diagram of magnetic bearing system with sensor runout
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Adaptive sensor runout compensation scheme
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Estimated parameters of sensor runout; true values are shown with dashed lines
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Stabilization of rotor geometric center in the presence of sensor runout
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Block diagram of closed-loop system in the presence of uncertainty
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Sensor runout estimation for uncertain plant; true values shown in dashed lines
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Stabilization of rotor for uncertain plant in the presence of sensor runout
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Trajectory of (a) estimated rotor geometric center and regenerated sensor signals, scale 1 V=50 μm (b) estimated Fourier coefficients of sensor runout, and (c) control currents, with and without ASRC. The controller used known plant parameter values.
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Trajectory of (a) estimated rotor geometric center and regenerated sensor signals, scale 1 V=50 μm, (b) estimated Fourier coefficients of sensor runout, and (c) control currents, with and without ASRC. To demonstrate robustness to parameter uncertainty, the adaptive controller used plant parameter values which were 25 percent larger.

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