Magnetic Bearing Control of Flexible Shaft Vibrations Based on Multi-access Velocity-Displacement Feedback-Reference-Cited by-同舟云学术

Magnetic Bearing Control of Flexible Shaft Vibrations Based on Multi-access Velocity-Displacement Feedback

Published:1995-01-01 Issue:1 Volume:117 Page:188-197
ISSN:0742-4795
Container-title:Journal of Engineering for Gas Turbines and Power
language:en
Short-container-title:

Author:

Petela G.¹,Botros K. K.¹

Affiliation:

1. Nova Husky Research Corp., Calgary, Alberta, Canada

Abstract

A model of the forced vibrations of a flexible, asymmetric, and unbalanced shaft, supported by two magnetic bearings, is derived to simulate the effect of different schemes of active control on shaft dynamic behavior. Simulation results were compared for several cases of single and multi-access bearing controls, rigid-body mode only and rigid with flexible mode control, and linear and nonlinear bearing responses. It is shown that the multi-access bearing response, calculated from the known equation of the stable ROCL (Reduced Order Closed Loop) and based on the direct velocity-displacement feedback, provided the most precise shift in critical frequencies and also reasonable suppression of shaft vibration amplitudes. The nonlinear bearing design was also briefly discussed. The stability analysis showed that stability limits were influenced by more parameters in this case, but no particular advantages were observed in suppression of the vibration amplitudes as compared to the linear case.

Publisher

ASME International

Subject

Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering

Link

http://asmedigitalcollection.asme.org/gasturbinespower/article-pdf/117/1/188/5524576/188_1.pdf

Reference29 articles.

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2. Allaire, P. E., Humphris, R. R., and Kelm, R. D., “Magnetic Bearings for Vibration Reduction and Failure Prevention,” Proc. of the 45th Meeting of Mech. Failure Prevention Group, NBS, Gaithersburg, MD, Apr. 16–18, 1985.

3. Allaire, P. E., Lewis, D. W., and Jain, V. K., “Feedback Control of a Single Mass Rotor on Rigid Supports,” J. of the Franklin Institute, Vol. 312, No. 1, July 1981.

4. Allaire, P. E., Lewis, D. W., and Knight, J. D., “Active Vibration Control of a Single Mass Rotor on Flexible Supports,” J. of the Franklin Institute, Vol. 315, No. 3, Mar. 1983.

5. Baruch, H., “A Recursive Pole Displacement Method for Large Flexible Structures,” presented at the 1987 ASME Design Technology Conferences—11th Biennial Conference on Mechanical Vibration and Noise, Boston, MA, Sept. 1987.

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