Open AccessOptimal closed-loop bandwidth of tip-tilt correction loop in adaptive optics system
Author(s) -
Youming Guo,
Xiaoyu Ma,
Changhui Rao
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.069502
Subject(s) - integrator , adaptive optics , bandwidth (computing) , tilt (camera) , physics , spectral density , control theory (sociology) , optics , residual , turbulence , closed loop , feedback loop , computer science , mathematics , telecommunications , mechanics , algorithm , geometry , control (management) , computer security , control engineering , artificial intelligence , engineering
Based on the most widely used proportional-integrator controller of the tip-tilt correction loop in an adaptive optical system, the relationship between the optimal closed-loop bandwidth and the atmosphere turbulence as well as the sensor noise is analyzed. Numerical simulation is also performed by using the time serial signals that follow the power spectrum density of the global tilt of Kolmogorov turbulence. Results show that with different atmosphere turbulences and sensor noises, the correction capability of the tip-tilt correction loop can be brought into full play by choosing appropriate closed-loop bandwidth and the residual variance can be reduced.