Design and Application of Magnetic Damper for Reducing Rotor Vibration

회전체 진동 감소를 위한 마그네틱 댐퍼의 설계 및 응용

  • Published : 2000.02.01


In this study, active control magnetic actuator for reducing vibration of rotor system is performed. Identification, modeling, simulation, control system design, and evaluation of active magnetic damper system have been researched. Power amplifier modeling, connected magnetic actuator and augmented by system identification, is included to establish a magnetic damper simulation which provides close performance correspondence to the physical plant. A magnetic actuator, digital controller using DSP(Digital Signal Processor), and bipolar operational power supply/amplifiers are developed to show the effectiveness of reducing rotor vibration. Also the curve fitting procedure to obtain the transfer function of frequency dependent components is developed. Two kinds of test are executed as sliding and oil bearing. Results presented in this paper will provide a well-defined technical parameters in designing magnetic damper system for the proposed rotor.


Magnetic Damper;Rotor Active Control;DSP Control;Oil Bearing;Curve Fitting


  1. Studer, P.A., 'A Practical Magnetic Bearing,' IEEE Transactions on Magnetics, Vol. MAG-13, No. 5, 1977, pp. 1155-1157
  2. Kim, D.G. and Kim, K.W., 1996, 'The Influence of Assembling Errors on the Performance of the Rotor Supported by Active Magnetic Bearing,' KSME Journal, Vol. 20, No. 112, , pp. 3909-3916
  3. Kasarda, M., Allaire, P.E., Humphris, R., and Barrett, L.E., 1988(may) 'A Magnetic Damper for First Mode Vibration Reduction in Multi-mass Flexible Rotors,' Workshop on Rotor Dynamic Problems in High-performance Turbo-machinery, Texas A&M University
  4. Salm, J.R., 'Active Electromagnetic Suspension of an Elastic Rotor: Modeling, Control, and Experimental Results' Journal of Vibration, Acoustics, Stress, and Reliability in Design, ASME, Vol.110, 1988, pp.493-501
  5. Gondhalekar, V. and Holmes, R., 1984(may) 'Design of an Electromagnetic Bearing for the Vibration Control of a Flexible Transmission Shaft,' Rotor Dynamic Instability Problems, in High Performance Turbo-machinery, Texas A&M University
  6. Burrows, C.R., Sahinkaya, M., and Clements, S., 1987(sep), 'Electro-magnetic Control of Oil Film Supported Rotor Using Sparse Measurements,' Rotaing Dynamics, ASME Publication, pp. 127-132
  7. Sahinkaya, M., and Burrows, C.R., 1985, 'Control of Stability and Synchronous Vibration of a Flexible Rotor Suported on Oil-Film Bearings,' ASME, Journal of Dynamic Systems, Measurement and Controls, Vol.107, pp. 137-144
  8. Allaire, P.E., Humphris, R., Kasarda, M., and Koolman, M.I., 1987(aug), 'Magnetic Bearing/Damper Effect on Unbalance Response of Flexible Rotors,' Proc. AIAA Conference, Philadelphia, PA, pp. 10-14
  9. Muszynska, A., 1988, 'Rotor Active Anti-swirl Control,' Journal of Vibration, Acoustics, Stress, and Reliability in Design, ASME, Vol.110, pp. 143-150
  10. Nikdajsen, J., Holmes, R., and Gondhalekar, V., 1979, 'Investigation of an Electromagnetic Damper for Vibration Control of a Transmission Shaft,' ImechE, pp. 331-336