[4] LIU B, FANG J CH, LIU G, et al.. Unbalance vibration control and experiment research of magnetically suspended flywheels [J]. Chinese Journal of Mechanical Engineering, 2010, 46(12): 188-194.(in Chinese)
[5] SETIAWAN D, MUKHERJEE R, MASLEN H. Synchronous disturbance compensation in active magnetic bearings using bias current excitation [C]. Proceedings of the IEEE/ASME International Conference on Advanced Intelligent Mechatronics, Como, Italy, 2001: 707-712.
[6] NEZAMABADI R, POSHTAN J, JAHED MOTLAGH M R. Robust control design to imbalance compensation and automatic balancing of magnetic bearings [C]. Proceedings of the IEEE International Conference on Industrial Technology, Mumbai, India,2006: 1093-1098.
[7] BI C, WU D Z, JIANG Q, et al.. Automatic learning control for unbalance compensation in active magnetic bearings [J]. IEEE Transactions on Magnetics,2005, 41(7): 2270-2280.
[8] HERZOG R, BUHLER P, GAHLER C, et al.. Unbalance compensation using generalized notch filters in the multivariable feedback of magnetic bearings[J]. IEEE Transactions on Control Systems Technology, 1996, 4(5): 580-586.
[9] LI L, SHINSHI T, LIJIMA C, et al.. Compensation of rotor imbalance for precision rotation of a planar magnetic bearing rotor [J]. Precision Engineering, 2003, 27: 140-150.
[10] HUANG X W, TANG ZH L. New method for autobalancing with active magnetic bearings[J]. Chinese Journal of Mechanical Engineering, 2001, 37(7):96-99.(in Chinese)
[11] CHEN X, KOMADA S, FUKUDA T. Design of a nonlinear disturbance observer [J]. IEEE Transaction on Industry Electronics, 2000,47(2):429-437.
[12] HAN J Q. From PID technique to active disturbances rejection control technique [J]. IEEE Transactions on Industrial Electronics, 2009, 56(3): 900-906.
[13] MIZUNO T, HIGUCHI T. Design of magnetic bearing controllers based on disturbance estimation [C]. The 2nd International Symposium on Magnetic Bearings, Tokyo, Nissei Eblo, 1990:281-288.
[14] SHEN Y, SUN Y H, WANG SH H, et al.. Reduction of gyroscopic effect of a magnetic bearingsupported flywheel system [J]. Academic Journal of Xi’an Jiaotong University, 2003,37(11):1105-1109.(in Chinese)
[15] HAN J Q, YUAN L L. The discrete form of tracking-differentiator [J]. J.Sys.Sci.and Math.Scis., 1999,19(3): 268-273. (in Chinese).
[16] YI X, MEHRDAD S. Sliding-mode observer for uncertain system part I: linear sytem case [C]. Proceeding of the 39th IEEE Conference on Decision and Control, Sydney, 2000:316-321.
[17] TIAN H Q. Theory and Application of Sliding-modecontrol [M]. Wuhan: Wuhan Press, 1995. (in Chinese)
[18] SIVRIOGLU S. Gain-scheduled H∞ control of active magnetic bearing systems with gyroscopic effect [J]. Transactions of the Japan Society of Mechanical Engineers, 1997, 63(610): 1940-1947.