Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
권호 표지
DOI QR코드

DOI QR Code

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

공기포일 자기 하이브리드 베어링으로 지지되는 연성 축의 휨 모드 진동 제어

  • 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)
  • Received : 2011.01.05
  • Accepted : 2011.03.17
  • Published : 2011.04.30
Download PDF
⟨ Previous Next ⟩

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

References

  1. 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. https://doi.org/10.1115/1.2927211
  2. 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. https://doi.org/10.1115/1.483178
  3. 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. https://doi.org/10.1115/1.1417485
  4. Tarbares, D. R., "Rotordynamic Performance of A Rotor Supported on Bump-type Foil Bearings : Experiment & Predictions," Master thesis, Texas A&M University, 2006.
  5. Schweitzer, G. and Bleuler, H., Active Magnetic Bearings, Hochschulverlag AG, ETH Zurich, Switzerland, 1994.
  6. Lee, S. H., "Vibration Control and Stability of High Speed Rotor Supported by a Hybrid Bearings," Master thesis, Korea University, 2009.
  7. Park, J. H., "A Vibration Control of High Speed Rotating Shaft Supported by a Hybrid Air Foil-magnetic Bearings," Master thesis, Soongsil University, 2009.
  8. 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.
  9. 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. https://doi.org/10.5050/KSNVN.2003.13.7.508
  10. RK 4 rotor kit, Bently Nevada LLC. 1631 Bently Parkway South, Minden, Nevada USA 89423, 2000.
  11. RoDAP, DnM Technology Co., Seoul Korea.
  12. Frank, L. L., Applied Optimal Control & Estimation, Prentice-Hall, Inc., London, 1992.