Adaptive Optics; Frequency-based analysis; Magellan AO System; Vibration in AO control; Close loop; Future challenges; Magellan; Mitigation techniques; Operation conditions; Sources identifications; Vibration peak; Electronic, Optical and Magnetic Materials; Condensed Matter Physics; Computer Science Applications; Applied Mathematics; Electrical and Electronic Engineering
Abstract :
[en] Frequency-based analysis and comparisons of tip-Tilt on-sky data registered with 6.5 Magellan Telescope Adaptive Optics (MagAO) system on April and Oct 2014 was performed. Twelve tests are conducted under different operation conditions in order to observe the influence of system instrumentation (such as fans, pumps and louvers). Vibration peaks can be detected, power spectral densities (PSDs) are presented to reveal their presence. Instrumentation-induced resonances, close-loop gain and future challenges in vibrations mitigation techniques are discussed.
Disciplines :
Electrical & electronics engineering Space science, astronomy & astrophysics
Author, co-author :
Zúñiga Fernández, Sebastián Gaspar ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Exoplanets in Transit: Identification and Characterization
Garcés, Javier; AC3E, Departamento de Electronica, Universidad Tecnica Federico Santa Mara, Valparaso, Chile
Males, Jared R.; CAAO, Department of Astronomy and Steward Observatory, University of Arizona, Tucson, United States
Morzinski, Katie M.; CAAO, Department of Astronomy and Steward Observatory, University of Arizona, Tucson, United States
Escárate, Pedro; CAAO, Department of Astronomy and Steward Observatory, University of Arizona, Tucson, United States
Castro, Mario; AC3E, Departamento de Electronica, Universidad Tecnica Federico Santa Mara, Valparaso, Chile
Marchioni, José; AC3E, Departamento de Electronica, Universidad Tecnica Federico Santa Mara, Valparaso, Chile
Zagals, Diego; AC3E, Departamento de Electronica, Universidad Tecnica Federico Santa Mara, Valparaso, Chile
Language :
English
Title :
Vibrations in MagAO: Frequency-based analysis of on-sky data, resonance sources identification, and future challenges in vibrations mitigation
Publication date :
27 July 2016
Event name :
Adaptive Optics Systems V
Event place :
Edinburgh, Gbr
Event date :
26-06-2016 => 01-07-2016
Main work title :
Adaptive Optics Systems V
Editor :
Marchetti, Enrico
Publisher :
SPIE
ISBN/EAN :
978-1-5106-0197-0
Peer reviewed :
Editorial reviewed
Funders :
The Society of Photo-Optical Instrumentation Engineers (SPIE)
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Bibliography
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P. Welch, "The use of fast Fourier transform for the estimation of power spectra: A method based on time averaging over short, modified periodograms, " IEEE Trans. Audio Electroacoust., vol. 15, no. 2, pp. 70-73, Jun. 1967.
J. Garces, S. Zũniga, L. M. Close, J. R. Males, K. M. Morzinski, P. Escarate, M. Castro, J. Marchioni, and D. Rojas, "Vibrations in MagAO: Resonance sources identification and first approaches for modeling and control, " Proc. SPIE Astronomical Telescopes + Instrumentation, Adaptive Optics System V, (July, 2016).
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