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TECHNICAL PAPERS

Test and Theory Correlation Study for a Flexible Rotor on Fault-Tolerant Magnetic Bearings

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

Texas A&M University, Mech. Engineering, College Station, TX 77843

Andrew Provenza

NASA Glenn Research Center, Cleveland, OH

J. Vib. Acoust 124(3), 359-366 (Jun 12, 2002) (8 pages) doi:10.1115/1.1467652 History: Received May 01, 2001; Revised January 01, 2002; Online June 12, 2002
Copyright © 2002 by ASME
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References

Figures

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Schematic of a heteropolar magnetic bearing
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Fault-tolerant magnetic bearing test rig
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Finite element model of the flexible rotor
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Schematic of the fault-tolerant controller
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Transient response of the rotor displacements at the outboard bearing
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Rotor whirling response at 20000 RPM
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Transient response of the current inputs to the outboard bearing
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Transient response of the flux densities at the outboard bearing
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Displacement plots (peak-peak) of 3 coils (the 6-7-8th coils) failed operation
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Currents to the outboard bearing for 3 coils (the 6-7-8th coils) failed operation
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Displacements, TTL signals, and currents for a series of coil failure events

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