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TECHNICAL PAPERS

The Fault-Tolerant Control of Magnetic Bearings With Reduced Controller Outputs

[+] Author and Article Information
Uhn Joo Na, Alan Palazzolo

Texas A&M University, Mechanical Engineering, College Station, TX 77843-3123

J. Dyn. Sys., Meas., Control 123(2), 219-224 (Mar 24, 2000) (6 pages) doi:10.1115/1.1369356 History: Received March 24, 2000
Copyright © 2001 by ASME
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References

Habermann, H., and Liard, G., 1979, “Practical Magnetic Bearings,” IEEE Spectr., IEESAM Sept., pp. 26–30.
Allaire,  P. E., Lewis,  D. W., and Knight,  J. D., 1983, “Active Vibration Control of a Single Mass Rotor on Flexible Supports,” J. Franklin Inst., 315, pp. 211–222.
Salm, J., and Schweitzer, G., 1984, “Modeling and Control of a Flexible Rotor with Magnetic Bearing,” Proceedings of the Third International Conference on Vibrations in Rotating Machinery, pp. 553–561.
Matsumura,  F., and Yoshimoto,  T., 1986, “System Modeling and Control of a Horizontal-Shaft Magnetic-Bearing System,” IEEE Trans. Magn., 22, pp. 197–206.
Maslen,  E. H., and Meeker,  D. C., 1995, “Fault Tolerance of Magnetic Bearings by Generalized Bias Current Linearization,” IEEE Trans. Magn., 31, No. 3, pp. 2304–2314.
Meeker, D. C., 1996, “Optimal Solutions to the Inverse Problem in Quadratic Magnetic Actuators,” Ph.D. dissertation, Univ. of Virginia, Mechanical Engineering.
Maslen,  E. H., Sortore,  C. K., Gillies,  G. T., Williams,  R. D., Fedigan,  S. J., and Aimone,  R. J., 1999, “Fault Tolerant Magnetic Bearings,” ASME J. Eng. Gas Turbines Power, 121, pp. 504–508.
Lyons, J. P., Preston, M. A., Gurumoorthy, R., and Szczesny, P. M., 1994, “Design and Control of a Fault-Tolerant Active Magnetic Bearing System for Aircraft Engine,” Proceedings of the Fourth International Symposium on Magnetic Bearings, ETH Zurich, pp. 449–454.
Maslen,  E., Hermann,  P., Scott,  M., and Humphris,  R. R., 1989, “Practical Limits to the Performance of Magnetic Bearings: Peak Force, Slew Rate, and Displacement Sensitivity,” ASME J. Tribol., 111, pp. 331–336.
Knight,  J. D., Xia,  E., McCaul,  E., and Hacker,  H., 1992, “Determination of Forces in a Magnetic Bearing Actuator: Numerical Computation With Comparison to Experiment,” ASME J. Tribol., 114, pp. 796–801.
Allaire,  P. E., Fittro,  R. L., Maslen,  E. H., and Wakefield,  W. C., 1997, “Measured Force/Current Relations in Solid Magnetic Thrust Bearings,” ASME J. Eng. Gas Turbines Power, 119, pp. 131–142.
Allaire, P. E., et al., 1988, “Design and Testing of a Magnetic Thrust Bearing,” Proceedings of the NASA Workshop on Magnetic Suspension Technology.
Na,  U. J., and Palazzolo,  A. B., 2000, “Optimized Realization of Fault-Tolerant Heteropolar Magnetic Bearings,” ASME J. Vibr. Acoust., 122, pp. 209–221.
Na,  U. J., and Palazzolo,  A. B., 2000, “Fault Tolerance of Magnetic Bearings With Material Path Reluctance and Fringing Factors,” IEEE Trans Magn., 36, pp. 3939–3946.
Keith,  F. J., Williams,  R. D., and Allaire,  P. E., 1990, “Digital Control of Magnetic Bearings Supporting a Multimass Flexible Rotor,” STLE Tribol. Trans., 33, pp. 307–314.

Figures

Grahic Jump Location
Heteropolar magnetic bearing with grouped currents
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Fault-tolerant control scheme with 3 coil groups
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Schematic of the rotor-bearing system
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Orbit plot for normal operation to the 2–4th coil pairs failed operation
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Current plot for normal operation to the 2–4th coil pairs failed operation
Grahic Jump Location
Flux density plot for normal operation to the 2–4th coil pairs failed operation

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