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Investigations on critical speed suppressing by using electromagnetic actuators

  • Mahfoud, Jarir (Universite de Lyon - Laboratoire de Mecanique des Contacts et des Structures - UMR CNRS 5259, Institut National des Sciences Appliquees de Lyon) ;
  • Der Hagopian, Johan (Universite de Lyon - Laboratoire de Mecanique des Contacts et des Structures - UMR CNRS 5259, Institut National des Sciences Appliquees de Lyon)
  • Received : 2011.08.05
  • Accepted : 2012.03.09
  • Published : 2012.04.25
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Abstract

The possibility of suppressing critical speeds by using electromagnetic actuators (EMAs) is assessed experimentally in this paper. The system studied is composed of a horizontal flexible shaft supported by two ball bearings at one end and one roller bearing that is located in a squirrel cage at the other end. Four identical EMAs supplied with constant current are utilized. The EMAs associated to the squirrel cage constitutes the hybrid bearing. Results obtained, show that the constant current, when applied to the EMAs, produces a shift of the first critical speed toward lower values. Moreover, the application of constant current for a speed interval around the critical speed enables a smooth run-up or run-down without crossing any resonance.

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References

  1. Aenis, M., Knopf, E. and Nordmann, R. (2002), "Active magnetic bearings for the identification and fault diagnosis in turbomachinery", Mechatronics, 12(8), 1011-1021. https://doi.org/10.1016/S0957-4158(02)00009-0
  2. Der Hagopian, J., Belhaq, M., Seibold, Z. and Mahfoud, J. (2010), "Maitrise de Phenomenes de Saut dans les Reponses Frequentielles des Structures avec Non Linearite Localisee", Mach. Ind., 11(5), 419-425.
  3. Der Hagopian, J. and Mahfoud, J. (2010), "Electromagnetic Actuator Design for the Control of Light Structures", Smart Struct. Syst., 6(1), 29-38. https://doi.org/10.12989/sss.2010.6.1.029
  4. El-Shafei, A. and Dimitri, A.S. (2010), "Controlling journal bearing instability using active magnetic bearings", J. Eng.Gas Turb. Power, 132(1), 1-9.
  5. Kasarda, M., Marshall, J. and Prins, R. (2007), "Active magnetic bearing based force measurement using the multi-point technique", Mech. Res. Commun., 34(1), 44-53. https://doi.org/10.1016/j.mechrescom.2006.06.003
  6. Kasarda, M., Mendoza, H., Kirk, R.G. and Wicks, A. (2004), "Reduction of subsynchronous vibrations in a single-disk rotor using an active magnetic damper", Mech. Res. Commun., 31(6), 689-695. https://doi.org/10.1016/j.mechrescom.2004.04.004
  7. Kulesza, Z., Sawicki, J.T. and Storozhev, D.L. (2010), "Smart properties of AMB supported machines for rotor crack detection: Experimental and analytical study", Proceedings of the 8th IFToMM International Conference on Rotordynamics, September 12-15, KIST, Seoul, Korea.
  8. Larsonneur, R. and Richard, P. (2008), Smart turbomachines using active magnetic bearings, Paper GT2008- 51299, ASME Turbo Expo, Berlin, Germany, June 9-13.
  9. Lei, S. and Palazzolo, A. (2008), "Control of flexible rotor systems with active magnetic bearings", J. Sound Vib., 314(1-2), 19-38. https://doi.org/10.1016/j.jsv.2007.12.028
  10. Mani, G., Quinn, D.D. and Kasaeda, M. (2006), "Active health monitoring in a rotating cracked shaft using active magnetic bearings as force actuators", J. Sound Vib., 294(3), 454-465. https://doi.org/10.1016/j.jsv.2005.11.020
  11. Maslen, E.H., Allaire, P.E., Noh, M.D. and Sortore, C.K. (1996), "Magnetic bearing design for reduced power consumption", J. Tribol - T. ASME., 118(4), 839-846. https://doi.org/10.1115/1.2831617
  12. Maslen, E.H. (2008), Smart machine advances in rotating machinery, IMechE, Exeter, UK, 8-10 September.
  13. Schweitzer, G., Bleuler, H. and Traxler, A. (2003), Active Magnetic Bearings - Basics, Properties and Applications, vdf Hochschulverlag AG, ETH, Zurich.
  14. Souza Morais, T., Steffen Jr, V., Mahfoud, J. and Der Hagopian, J. (2010), "Unbalance identification in nonlinear rotors", Proceedings of the 8th IFToMM International Conference on Rotordynamics, September 12-15, KIST, Seoul, Korea.
  15. Souza Morais, T., Steffen Jr, V., Mahfoud, J. and Der Hagopian, J. (2009), "Monitoring cracked shaft by using active electro-magnetic actuator - numerical simulation", Proceedings of the 20th International Congress of Mechanical Engineering, COBEM 2009, November 15-20, Gramado, RS, Brazil.

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