Multi-State Transient Rotor Vibration Control Using Sampled Harmonics

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

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

J. Vib. Acoust 124(2), 186-197 (Mar 26, 2002) (12 pages) doi:10.1115/1.1448321 History: Received August 01, 2000; Revised September 01, 2001; Online March 26, 2002
Copyright © 2002 by ASME
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(a) Schematic representation of discrete transient vibration control using harmonic components (b) System control with error in pth harmonic transfer function
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(a) Flexible rotor/magnetic bearing system layout (b) Mass loss mechanism and transducer pair
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Rotor synchronous vibration measured at non-driven end bearing and disk
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System identification for speed A (a) synchronous component of input signal (b) measured synchronous component response (c) 4th order inverse plant model (d) 9th order inverse plant model
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Theoretical stability regions showing relative system errors that can be tolerated for stable controller operation (a) one cycle delay in control action (b) two cycle delay in control action
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Experimentally determined stability regions
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Measured mass loss response (15.7 g at 0.5 s) at speed A (a) no control (b) k1=0.7,d1=0.7 (c) k1=0.85,d1=0.808 (d) k1=0.6,d1=0.588
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Measured mass loss response (15.7 g at 0.5 s) with k1=0.7,d1=0.7 (a) Speed B (b) Speed C (c) Speed D
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Measured mass loss response at speed A with k1=0.7,d1=0.7. (a) 35.7 g at 0.5 s, uncontrolled (b) 35.7 g at 0.5 s, controlled (c) 70.0 g at 0.5 s, controlled.



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