[1] Schweitzer G., Maslen E., Bleuler H., Traxler A., Cole M., and Keogh P., Magnetic bearings: theory, design, and application to rotating machinery, Springer, 2009.
[2] Chiba A., Fukao T., Ichikawa O., Oshima M., Takemoto M., and Dorrell DG., Magnetic bearings and bearingless drives, Elsevier, London, 2005.
[3] Nayfeh, A.H., and Balachandran, B., Applied non-linear dynamics: analytical, computational and experimental methods, Wiley, New York, 1995.
[4] Ji J. C., Yu L., and Leung A. Y. T., Bifurcation behavior of a rotor supported by active magnetic bearings. J Sound Vibr, Vol. 235, No. 1, pp. 133-151, 2000.
[5] Yang X. D., An H. Z., Qian Y. J., Zhang W., and Yao M. H., Elliptic motions and control of rotors suspending in active magnetic bearings. J Comput and Nonlinear Dynam, Vol. 11, pp. 1-8, 2016.
[6] Ji J. C., and Hansen C. H., Nonlinear oscillations of a rotor in active magnetic bearings. J Sound Vibr, Vol. 240, No.4, pp. 599-612, 2001.
[7] Inayat-Hussain J. I., Nonlinear dynamics of a magnetically supported rigid rotor in auxiliary bearings. Mech Mach Theory, Vol. 45, pp. 1651-1667, 2010.
[8] Inayat-Hussain J. I., Chaos via torus breakdown in the vibration response of a rigid rotor supported by active magnetic bearings. Chaos Solitons and Fractals, Vol. 31, pp. 912–927, 2007.
[9] Jang M.J., and Chen C. K., Bifurcation analysis in flexible rotor supported by active magnetic bearings. Int J Bifurcat Chaos, Vol. 11, No. 8, pp. 2163-2178, 2001.
[10] Payyoor N., Tiwari M., and Gupta K., Nonlinear dynamics, instability and chaos of two spool aero gas turbine rotor system. Proc. of ASME, Gas Turbine India Conference, Bangalore, Karnataka, DC, 5, 2013.
[11] Chiang H. W. D., Hsu C. N., and Tu S. H., Rotor-bearing analysis for turbo machinery single- and dual-rotor systems. J Propul Power, Vol.20, No. 6, pp. 1096-1104, 2004.
[12] Ferraris G., Maisonneuve V., and Lalanne M., Prediction of the dynamic behavior of non-symmetric coaxial co or counter-rotating rotors. J Sound Vibr, Vol. 195, No. 4, pp. 649-666, 1996.
[13] Ebrahimi R., Ghayour M., Khanlo H. M., Chaotic vibration analysis of a coaxial rotor system in active magnetic bearings and contact with auxiliary bearings. Journal of Computational and Nonlinear Dynamics, Vol. , pp. , 2016.
[14] Jenkins G. M., and Watt D. G., Spectral analysis and its applications, Holden-Day, Michigan, 1969.
[15] Moon F. C., Chaotic vibration, an introduction for applied scientists and engineers, John Wiley, New Jersey, 2004.
[16] Chen Y., Bifurcation and chaos in engineering, Springer, 1998.
)