[1] Cho. D., Kato. Y., and Spilman. D., “Sliding mode and classical control for magnetic levitation systems,” IEEE Control Systems, vol. 13, no. 1, pp. 43–48, 1993.
[2] Yeh T.J., Chung. Y .J., Youcef-Toumi. K., “Sliding mode control of magnetic bearing systems,” Journal of Dynamic Systems, Measurement, and Control, vol. 123, no. 3, pp. 353–362, 2001.
[3] Yang, J., Li, S., and Yu, X., “Sliding-Mode Control for Systems With Mismatched Uncertainties via a Disturbance Observer,” IEEE Transaction on Industrial Electronics, vol. 60, no. 1, pp. 160-169, Jan 2013.
[4] Annaswamy. A. M., Thanomsat. C., Mehta. N., Loh. A.P., “Applications of adaptive controllers to systems with nonlinear parameterization,” ASME Journal of Dynamic Systems, Measurement, and Control, vol. 120, no. 2, pp. 477–487, 1998.
[5] Yang Z.J., Tateishi. M., “Adaptive robust nonlinear control of a magnetic levitation system,” Automatica, vol. 37, no. 7, pp. 1125–1131, 2001.
[6] Hajimani, M., Dashti, Z. A. S., Gholami, M., Jafari, M., Shoorehdeli, M. A., “Neural Adaptive Controller for Magnetic levitation System,” IEEE Iranian Conference on Intelligent System (ICIS), pp. 1-6, 2014.
[7] Yang. Z. J., Kunitoshi. K., Kanae. S. and Wada. K., “Adaptive Robust Output-Feedback Control of a Magnetic Levitation System by K-Filter Approach,” IEEE Transaction on Industrial Electronics, vol. 55, no. 1, pp. 390-399, Jan 2008.
[8] Yang. Z. J., Fukushima. Y., Kanae. S., and Wada. K., “Robust non-linear output-feedback control of a magnetic levitation system by k-filter approach,” IET Control Theory and Application, vol. 3, no. 7, pp. 852-864, Jul 2009.
[9] Yang. Z. J., “Robust output-feedback control of a magnetic levitation system,” International Conference on Modeling, Identification and Control (ICMIC), pp. 219-224, Okayama, Japan, Jul 2010.
[10] Lin, F. J., Chen, S. Y., & Shyu, K. K., “Robust dynamic sliding-mode control using adaptive RENN for magnetic levitation system.,” IEEE Transactions on Neural Networks, vol. 20, no. 6, pp. 938-951, 2009.
[11] Shieh, H. J., Siao, J. H., & Liu, Y. C., “A robust optimal sliding‐mode control approach for magnetic levitation systems,” Asian Journal of Control, vol. 12, no.4, pp. 480-487, 2010.
[12] Moghaddam, E. T., & Ganji, J., “Sliding Mode Control of Magnetic Levitation Systems Using Hybrid Extended Kalman Filter,” Energy Science and Technology, vol. 2, no. 2, pp. 35-42, 2011.
[13] Yang, Z. J., Hara, S., Kanae, S., & Wada, K., “Robust output feedback control of a class of nonlinear systems using a disturbance observer,” IEEE Transactions on Control Systems Technology, vol. 19, no.2, pp. 256-268, 2011.
[14] Yang, Z. J., and Minashima, M., “Robust nonlinear control of a feedback linearizable voltage-controlled magnetic levitation system,” Transactions -Institute of Electrical Engineers of Japan, vol. 121, no. 7, pp. 1203-1211, 2001.
[15] Yang, Z. J., Miyazaki, K., Kanae, S. and Wada, K., “Robust Position Control of a Magnetic Levitation System via Dynamic Surface Control Technique,” IEEE Transaction on Industrial Electronics, vol. 51, no. 1, pp. 26-34, 2004.
[16] Mahmoud, N. I., “A backstepping design of a control system for a magnetic levitation system,” Doctoral dissertation Linköping, 2003.
[17] Meena. N., Sharma, B.B., “Backstepping Algorithm with Sliding Mode Control for Magnetic Levitation System,” International Journal of Emerging Trends in Electrical and Electronics, vol. 10, no. 3, 2014.
[18] Yang. Z. J., Tsubakihara. H., Kanae. S., Wada. K., Chun-Yi Su, “Robust Nonlinear Control of a Voltage-Controlled Magnetic Levitation System with Disturbance Observer,” IEEE International Conference on Control Application, pp. 747-752, Oct 2007.
[19] Li. W., and Lin P. W. Q., “The Feedback Linearization Based on Backstepping Technique,” International Conference on Intelligent Computing and Intelligent Systems (ICIS), vol. 2, pp. 282-286, Shanghai, china, Nov 2009.
[20] Chen. W. H., Balance. D. J. and Gawthrop. P. J., “A nonlinear disturbance observer for robotic manipulators,” IEEE Transaction on Industrial Electronics, vol. 47, no. 4, pp. 932-938, 2000.
[21] Chen. W. H., “Disturbance Observer Based Control for Nonlinear Systems,” IEEE/ASME Transaction on Mechatronics, vol. 9, no. 4, pp. 706-710, Dec 2004.
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