Vibrations in AO control: A short analysis of on-sky data around the world

Caroline Kulcsár, Gaetano Sivo, Henri François Raynaud, Benoît Neichel, François Rigaut, Julian Christou, Andres Guesalaga, Carlos Correia, Jean Pierre Véran, Éric Gendron, Fabrice Vidal, Gérard Rousset, Tim Morris, Simone Esposito, Fernando Quirós-Pacheco, Guido Agapito, Enrico Fedrigo, Lorenzo Pettazzi, Richard Clare, Riccardo MuradoreOlivier Guyon, Frantz Martinache, Serge Meimon, Jean Marc Conan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

33 Scopus citations

Abstract

We present in this paper an analysis of several tip-tilt on-sky data registered on adaptive optics systems installed on different telescopes (Gemini South, William Herschel Telescope, Large Binocular Telescope, Very Large Telescope, Subaru). Vibration peaks can be detected, and it is shown that their presence and location may vary, and that their origin is not always easy to determine. Mechanical solution that have been realized to mitigate vibrations are presented. Nevertheless, residual vibrations may still affect the instruments' performance, ranging from narrow high frequency vibration peaks to wide low frequency windshake-type perturbations. Power Spectral Densities (PSDs) of on-sky data are presented to evidence these features. When possible, indications are given regarding the gain in performance that could be achieved with adequate controllers accounting for vibration mitigation. Two examples of controller identification and design illustrate their ability to compensate for various types of disturbances (turbulence, windshake, vibration peaks, ...), showing a significant gain in performance.

Original languageEnglish (US)
Title of host publicationAdaptive Optics Systems III
DOIs
StatePublished - Dec 1 2012
Externally publishedYes
EventAdaptive Optics Systems III - Amsterdam, Netherlands
Duration: Jul 1 2012Jul 6 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8447
ISSN (Print)0277-786X

Other

OtherAdaptive Optics Systems III
CountryNetherlands
CityAmsterdam
Period7/1/127/6/12

Keywords

  • Adaptive optics systems
  • Atmospheric turbulence
  • Discrete-time lqg control
  • Disturbance identification
  • H2 control
  • Spectral analysis
  • Tip/tilt control
  • Vibration filtering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Kulcsár, C., Sivo, G., Raynaud, H. F., Neichel, B., Rigaut, F., Christou, J., Guesalaga, A., Correia, C., Véran, J. P., Gendron, É., Vidal, F., Rousset, G., Morris, T., Esposito, S., Quirós-Pacheco, F., Agapito, G., Fedrigo, E., Pettazzi, L., Clare, R., ... Conan, J. M. (2012). Vibrations in AO control: A short analysis of on-sky data around the world. In Adaptive Optics Systems III [84471C] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8447). https://doi.org/10.1117/12.925984