[3] [3] HOSHYAR M, MOLA M. Full adaptive integral backstepping controller for interior permanent magnet synchronous motors[J]. Asian Journal of Control, 2018, 20(2): 768- 779.

[4] [4] LIU X D, LI K, ZHANG C H. Improved backstepping control with nonlinear disturbance observer for the speed control of permanent magnet synchronous motor[J]. Journal of Electrical Engineering & Technology, 2019, 14(1): 275-285.

[6] [6] TARCZEWSKI T, GRZESIAK L M. Constrained state feedback speed control of PMSM based on model predictive approach[J]. IEEE Transactions on Industrial Electronics, 2016, 63(6): 3867-3875.

[8] [8] ZHANG X G, SUN L Z, ZHAO K, et al.. Nonlinear speed control for PMSM system using sliding-mode control and disturbance compensation techniques[J]. IEEE Transactions on Power Electronics, 2013, 28(3): 1358-1365.

[9] [9] QIAN J Z, XIONG A, MA W L. Extended state observer-based sliding mode control with new reaching law for PMSM speed control[J]. Mathematical Problems in Engineering, 2016, 2016: 1-10.

[10] [10] CHOI H H, KIM E K, YU D Y, et al.. Precise PI speed control of permanent magnet synchronous motor with a simple learning feedforward compensation[J]. Electrical Engineering, 2017, 99(1): 133-139.

[12] [12] XIA P P, DENG Y T, WANG Z Q, et al.. Speed adaptive sliding mode control with an extended state observer for permanent magnet synchronous motor[J]. Mathematical Problems in Engineering, 2018, 2018(2018): 1-13.

[14] [14] XU W, JIANG Y J, MU C X. Novel composite sliding mode control for PMSM drive system based on disturbance observer[J]. IEEE Transactions on Applied Superconductivity, 2016, 26(7): 1-5.

[16] [16] LI S H, ZHOU M M, YU X H. Design and implementation of terminal sliding mode control method for PMSM speed regulation system[J]. IEEE Transactions on Industrial Informatics, 2013, 9(4): 1879-1891.

[17] [17] LIU J, LI H W, DENG Y T. Torque ripple minimization of PMSM based on robust ILC via adaptive sliding mode control[J]. IEEE Transactions on Power Electronics, 2018, 33(4): 3655-3671.

[18] [18] ZHENG J C, WANG H, MAN Z H, et al.. Robust motion control of a linear motor positioner using fast nonsingular terminal sliding mode[J]. IEEE/ASME Transactions on Mechatronics, 2015, 20(4): 1743-1752.

[19] [19] YANG L, YANG J Y. Nonsingular fast terminal sliding-mode control for nonlinear dynamical systems[J]. International Journal of Robust and Nonlinear Control, 2011, 21(16): 1865-1879.

[20] [20] LI S, YANG J, CHEN W-H, et al.. Disturbance Observer-Based Control: Methods and Applications[M]. Boca Raton: CRC press, 2016.

[21] [21] FREIDOVICH L B, KHALIL H K. Performance recovery of feedback-linearization-based designs[J]. IEEE Transactions on Automatic Control, 2008, 53(10): 2324-2334.

[22] [22] ZUO Z Y. Non-singular fixed-time terminal sliding mode control of non-linear systems[J]. Iet Control Theory and Applications, 2015, 9(4): 545-552.