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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

On the Control of Synchronous Vibration in Rotor/Magnetic Bearing Systems Involving Auxiliary Bearing Contact

[+] Author and Article Information
P. S. Keogh, M. O. T. Cole, M. N. Sahinkaya, C. R. Burrows

Department of Mechanical Engineering, Faculty of Engineering and Design, University of Bath, Bath BA2 7AY, UK

J. Eng. Gas Turbines Power 126(2), 366-372 (Jun 07, 2004) (7 pages) doi:10.1115/1.1689362 History: Received December 01, 2001; Revised March 01, 2002; Online June 07, 2004
Copyright © 2004 by ASME
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References

Figures

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Schematic layout of flexible rotor/magnetic bearing facility showing sensors (1–8), auxiliary bearings and bushes (A–F)
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Magnitudes of measured synchronous vibration components at selected sensors
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Phases of measured synchronous vibration components at selected sensors
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System structure with contact dynamics
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Synchronous control with rotor contact (rotor speed 24 Hz, 480 gcm unbalance)
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Rotor orbits before and after synchronous control force application (rotor speed 24 Hz, 480 gcm unbalance)
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Modified synchronous vibration control with rotor contact (rotor speed 24 Hz, 480 gcm unbalance)
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Rotor orbits at selected times (see Fig. 7, rotor speed 24 Hz, 480 gcm unbalance). A–before vibration control, C–after modified synchronous vibration control, E–following final synchronous vibration control.

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