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http://dx.doi.org/10.9725/kstle.2011.27.2.057

Bending Mode Vibration Control of a Flexible Shaft Supported by a Hybrid Air-foil Magnetic Bearing  

Jeong, Se-Na (Dept. of Mechanical Engineering, Soongsil University)
Ahn, Hyeong-Joon (Dept. of Mechanical Engineering, Soongsil University)
Kim, Seung-Jong (Energy Mechanics Center, Korea Institute of Science and Technology)
Lee, Yong-Bok (Energy Mechanics Center, Korea Institute of Science and Technology)
Publication Information
Tribology and Lubricants / v.27, no.2, 2011 , pp. 57-64 More about this Journal
Abstract
Hybrid air-foil magnetic bearing integrates two oil free bearing technologies synergetically to adopt the strengths of two bearings with minimizing their weaknesses. This paper presents bending mode vibration control of a flexible shaft supported by the hybrid air-foil magnetic bearing. An experiment set-up of a flexible shaft supported by the hybrid air-foil magnetic bearing is built. In order to verify the effectiveness of the hybrid bearing, unbalance responses of the flexible shaft supported by three different bearings: air-foil, magnetic and hybrid bearings are compared. Effect of load sharing between air-foil and magnetic bearings are investigated through changing the control gain and the rotor center position of magnetic bearing. The experimental results shows that the hybrid bearing can control the bending mode vibration of the flexible shaft effectively and an optimal performance can be achieved with an appropriate load sharing between the air-foil and the magnetic bearings.
Keywords
hybrid air-foil magnetic bearing; bending mode; vibration control;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 RK 4 rotor kit, Bently Nevada LLC. 1631 Bently Parkway South, Minden, Nevada USA 89423, 2000.
2 RoDAP, DnM Technology Co., Seoul Korea.
3 Frank, L. L., Applied Optimal Control & Estimation, Prentice-Hall, Inc., London, 1992.
4 Schweitzer, G. and Bleuler, H., Active Magnetic Bearings, Hochschulverlag AG, ETH Zurich, Switzerland, 1994.
5 Lee, S. H., "Vibration Control and Stability of High Speed Rotor Supported by a Hybrid Bearings," Master thesis, Korea University, 2009.
6 Park, J. H., "A Vibration Control of High Speed Rotating Shaft Supported by a Hybrid Air Foil-magnetic Bearings," Master thesis, Soongsil University, 2009.
7 Ahn, H. J., "A Study on System Identification and Vibration Control of the AMB Spindle for High Speed Precision Machining using Cylindrical Capacitive Sensors," Ph. D. Thesis, Mechanical and Aerospace Engineering, Seoul National University, 2001.
8 Kim, K. J. and Lee, C. W., "Identification of Dynamics Characteristics of Squeeze Film Damper Using Active Magnetic Bearing System as an Exciter," Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 13, No. 7, pp. 508-516, 2003.   DOI
9 Heshmat, H., "Advancements in the Performance of Aerodynamic Foil Journal Bearings: High Speed and Load Capability," ASME Journal of Tribology, Vol. 116, No. 2, pp. 287-295, 1994.   DOI   ScienceOn
10 Heshmat, H., Ming Chen, H., and Walton II J. F., "On the Performance of Hybrid Foil-Magnetic Bearings," ASME Journal of Engineering for Gas Turbines and Power, Vol. 122, No. 1, pp. 73-81, 2000.   DOI   ScienceOn
11 Swanson, E. E., Heshmat, H., and Walton, J., "Performance of a Foil-Magnetic Hybrid Bearing," ASME Journal of Engineering for Gas Turbines and Power, Vol. 124, pp. 375-382, 2002.   DOI   ScienceOn
12 Tarbares, D. R., "Rotordynamic Performance of A Rotor Supported on Bump-type Foil Bearings : Experiment & Predictions," Master thesis, Texas A&M University, 2006.