[1] [1] Mint H C. Progress on the 150 inch AngloAustralian telescope [C]Proceedings of the Astronomical Society of Australia, 1971(60): 26.

[2] [2] Burns M K. Servo simulation modeling f Gemini 8m telescopes [C]Proc of SPIE, 1995, 2479: 217232.

[3] [3] Erm T, Gutierrez P. Integration tuning of the VLT drive systems [C]Proc of SPIE, 2000, 4004: 490499.

[4] [4] Noguchi T, Tanaka W, Sasaki T, et al. Evaluation of the Subaru telescope control system inshop test erection [C]International Society f Optics Photonics, 1998, 3351: 361366.

[5] [5] Suárez M, Rosich J, tega J, et al. The GTC main axes servos control system [C]Proc of SPIE, 2008, 7019: 70190J.

[6] [6] Marchii G, Busatta A, Ghedin L, et al. The EELT Project: the telescope main structure detailed design study [C]Proc of SPIE, 2012, 8444: 8444O.

[7] [7] Erm T M, Seppey A. A cost effective direct drive option f the Thirty Meter Telescope [C]Proc of SPIE, 2006, 6273: 627335.

[8] Xu Tang, Xiuhe Wang, Mengmeng Tian, et al. Study of reduction methods of cogging torque in line-start permanent magnet synchronous motor by changing the parameters of stator teeth and slots. Transaction of China Electrotechnical Society, 31, 1-8(2016).

[9] Songning Shi, Dazhi Wang. Magnet skewing optimization method for reducing cogging torque in permanent magnet drive. Transaction of China Electrotechnical Society, 30, 27-32(2015).

[10] [10] Hu Xiaofei, Liu Chao, Wang Yi, et al. Analysis optimization of single phase brushless slotted limitedangle tque mot [J]. Transaction of China Electrotechnical Society, 2019, 34(13): 27442751. (in Chinese)

[11] R Islam, I Husain, A Fardoun, et al. Permanent-magnet synchronous motor magnet designs with skewing for torque ripple and cogging torque reduction. IEEE Transactions on Industry Applications, 45, 152-160(2009).

[12] [12] Zhang Jian, Wen Xuhui, Li Wenshan, et al. Research on harmonic current suppression strategies of permanent mag synchronous mot systems based on harmonic observers [C]Proceedings of the CSEE, 2020, 40(10): 33363349. (in Chinese)

[13] Shuo Wang, Jinsong Kang. Harmonic extraction and suppression method of permanent magnet synchronous motor based on adaptive linear neural network. Transaction of China Electrotechnical Society, 34, 654-663(2019).

[14] [14] Tang Renyuan. Moden Permanent Mag Machines [M]. Beijng: Machinery Industry Press, 2005. (in Chinese)

[15] Y Sato, T Ishizuka, K Nezu, et al. A new control strategy for voltage-type PWM rectifiers to realize zero steady-state control error in input current. IEEE Transactions on Industry Applications, 34, 480-486(1998).