[1] [1] F. Francois and S. Jean, Optical Engineering 53, 034103(2014).

[2] [2] J. Surdej, O. Absil, P. Bartczak and E. Borra, Proceedings of SPIE - The International Society for Optical Engineering, Ground-based and Airborne Telescopes 6267, 626704 (2006).

[3] [3] H. Paul, Applied Optics 45, 8052 (2006).

[4] [4] R. K. Tyson, Principle of Adaptive Optics, CRC Press, Boca Raton, 2011.

[5] [5] H. X. Zhang, J. Zhang and Y. J. Qiao, Journal of Optoelectronics Laser 24, 838 (2013). (in Chinese)

[6] [6] L. Xuan, D. Y. Li and Y. G. Liu, Chinese Journal of Liquid Crystal and Displays 30, 1 (2015). (in Chinese)

[7] [7] L. Q. Han and Y. H. You, Journal of Optoelectronics Laser 26, 857 (2015). (in Chinese)

[8] [8] K. L. Wlodarczyk, E. Bryce and N. Schwartz, Review of Scientific Instruments 85, 024502 (2014).

[9] [9] C. Bechet, A. Guesalaga, B. Neichel and V. Fesquet, Optics Express 22, 2994 (2014).

[10] [10] Z. Z. Wu, A. Iqbal and F. Ben Amara, Modeling and Control of Magnetic Fluid Deformable Mirrors for Adaptive Optics Systems, Berlin, Springer, 2013.

[11] [11] D. Brousseau, S. Thibault, E. F. Borra and S. F. Boivin, Applied Optics 53, 4903 (2014).

[12] [12] Lemmer A J, Griffiths I M and Groff T D, Mathematical and Computational Modeling of a Ferrofluid Deformable Mirror for High-contrast Imaging, SPIE Astronomical Telescopes and Instrumentation, 99122K (2016).

[13] [13] J. P. Dery, D. Brousseau and M. Rochette, Journal of Applied Polymer Science 134, 44542 (2016).

[14] [14] C. Gollwitzer, G. Matthias and R. Richter, Journal of Fluid Mechanics 571, 455 (2014).

[15] [15] Y. T. Yen, T. Y. Lu and Y. C. Lee, ACS Applied Materials & Interfaces 6, 4292 (2014).

[16] [16] Q. L. Cao, X. T. Han, B. Zhang and L. Li, IEEE Transactions on Applied Superconductivity 22, 4401504 (2012).

[17] [17] S. Skogestad and I. Postlethwaite, Multivariable Feedback Control: Analysis and Design, Springer London, 2005.