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Prediction control method to improve the dynamic performance of a close-loop adaptive optics system
Li, Xin-Yang1,2; Luo, Qi1,2,3; Yan, Zhao-Jun4
Source PublicationProceedings of SPIE: Adaptive Optics Systems V
Volume9909Pages:99094W
2016
Language英语
ISSN0277-786X
DOI10.1117/12.2235563
Indexed BySCI ; Ei
WOS IDWOS:000387429700141
SubtypeC
AbstractThe prediction control method can be used to reduce the dynamic performance of an adaptive optics system (AOS) correcting the wavefront distortion of atmosphere turbulence. Some researchers have proved this idea but usually in open-loop condition and based on the wavefront or sub-Aperture gradients of wavefront sensors. It is difficult to predict wavefront distortion in close-loop. But nearly all AOS are running in close-loop in practice to reduce the nonlinear error of wavefront sensor and deformable mirror (DM). In this paper, two prediction methods were proposed to improve the dynamic performance of an AOS both in open-loop and in close-loop. In one method, the Recursive Least-Square (RLS) algorithm was used to calculate the prediction and control parameters of an AOS based on the voltages of DM with 61 actuators. In another method, the Lucas-Kanade optical flow method was used to estimate transverse wind speed and calculate the predicted voltages of DM with 127 actuators. Numerical simulations were carried out with dynamic atmosphere turbulence in different conditions. The residual wave-front error, the Strehl Ratio, and the power spectrum densities were calculated and compared between an AOS with and without the prediction method. The results show that the dynamic control performances of an AOS will be improved significantly by using prediction control methods. © 2016 SPIE.
KeywordActuators Adaptive Control Systems Atmospheric Turbulence Forecasting Least Squares Approximations Mechanisms Optical Flows Turbulence Wavefronts Wind
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Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/8442
Collection自适应光学技术研究室(八室)
Affiliation1. Key Laboratory of Adaptive Optics, Chinese Academy of Sciences, Chengdu
2.610209, China
3. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu
4.610209, China
5. University of Chinese Academy of Sciences, Beijing
6.100039, China
7. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai
8.200030, China
Recommended Citation
GB/T 7714
Li, Xin-Yang,Luo, Qi,Yan, Zhao-Jun. Prediction control method to improve the dynamic performance of a close-loop adaptive optics system[J]. Proceedings of SPIE: Adaptive Optics Systems V,2016,9909:99094W.
APA Li, Xin-Yang,Luo, Qi,&Yan, Zhao-Jun.(2016).Prediction control method to improve the dynamic performance of a close-loop adaptive optics system.Proceedings of SPIE: Adaptive Optics Systems V,9909,99094W.
MLA Li, Xin-Yang,et al."Prediction control method to improve the dynamic performance of a close-loop adaptive optics system".Proceedings of SPIE: Adaptive Optics Systems V 9909(2016):99094W.
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