| DOI | Trouver le DOI : https://doi.org/10.1117/12.925984 |
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| Auteur | Rechercher : Kulcsár, C.; Rechercher : Sivo, G.; Rechercher : Raynaud, H.-F.; Rechercher : Neichel, B.; Rechercher : Rigaut, F.; Rechercher : Christou, J.; Rechercher : Guesalaga, A.; Rechercher : Correia, C.1; Rechercher : Véran, J.-P.1; Rechercher : Gendron, É.; Rechercher : Vidal, F.; Rechercher : Rousset, G.; Rechercher : Morris, T.; Rechercher : Esposito, S.; Rechercher : Quirós-Pacheco, F.; Rechercher : Agapito, G.; Rechercher : Fedrigo, E.; Rechercher : Pettazzi, L.; Rechercher : Clare, R.; Rechercher : Muradore, R.; Rechercher : Guyon, O.; Rechercher : Martinache, F.; Rechercher : Meimon, S.; Rechercher : Conan, J.-M. |
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| Affiliation | - Conseil national de recherches du Canada. Institut Herzberg d'astrophysique du CNRC
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| Format | Texte, Article |
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| Conférence | Adaptive Optics Systems III, July 1-6, 2012, Amsterdam, the Netherlands |
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| Sujet | Adaptive optics systems; Disturbance identification; H2 control; High frequency vibration; Large binocular telescope; LQG control; Residual vibrations; Tip-tilt; Very large telescope; Vibration mitigation; Vibration peak; William herschel telescopes; Adaptive optics; Atmospheric turbulence; Controllers; Identification (control systems); Optical telescopes; Power spectral density; Spectrum analysis; Telescopes; Vibrations (mechanical); Discrete time control systems |
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| Résumé | 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. © 2012 SPIE. |
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| Date de publication | 2012 |
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| Maison d’édition | SPIE |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21269218 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | b1e2132b-5437-4a8e-a272-c166359b8ed2 |
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| Enregistrement créé | 2013-12-12 |
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| Enregistrement modifié | 2020-04-21 |
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