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Dynamic calibration of adaptive optics systems / Chiuso, Alessandro in IEEE Transactions on control systems technology, Vol. 18 N° 3 (Mai 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 3 (Mai 2010) . - pp. 705-713 Titre : Dynamic calibration of adaptive optics systems : a system identification approach Type de document : texte imprimé Auteurs : Chiuso, Alessandro, Auteur ; Riccardo Muradore, Auteur ; Enrico Marchetti, Auteur Année de publication : 2011 Article en page(s) : pp. 705-713 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Adaptive  optics  (AOs)  Closed-loop  identification  Subspace  methods Index. décimale : 629.1 Résumé : Adaptive optics is used in astronomy to obtain high resolution images, close to diffraction limited, of stars and galaxies with ground telescopes, otherwise blurred by atmospheric turbulence. The measurements of one or more wavefront sensor are used to flatten distorted wavefronts with one or more deformable mirror in a feedback loop. In this brief, we shall report our experience on the problem of building an accurate (dynamical) model of the actuation (deformable mirror) and sensing (wavefront sensor) of adaptive optics system. This will be done adapting state-of-the-art system identification and model reduction techniques to the problem at hand. Our results are based on real data collected under various operating conditions from a demonstrator developed at the European Southern Observatory (ESO), which is now operating in the Paranal Observatory (Chile). DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5299108 [article] Dynamic calibration of adaptive optics systems : a system identification approach [texte imprimé] / Chiuso, Alessandro, Auteur ; Riccardo Muradore, Auteur ; Enrico Marchetti, Auteur . - 2011 . - pp. 705-713. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 3 (Mai 2010) . - pp. 705-713 Mots-clés : Adaptive  optics  (AOs)  Closed-loop  identification  Subspace  methods Index. décimale : 629.1 Résumé : Adaptive optics is used in astronomy to obtain high resolution images, close to diffraction limited, of stars and galaxies with ground telescopes, otherwise blurred by atmospheric turbulence. The measurements of one or more wavefront sensor are used to flatten distorted wavefronts with one or more deformable mirror in a feedback loop. In this brief, we shall report our experience on the problem of building an accurate (dynamical) model of the actuation (deformable mirror) and sensing (wavefront sensor) of adaptive optics system. This will be done adapting state-of-the-art system identification and model reduction techniques to the problem at hand. Our results are based on real data collected under various operating conditions from a demonstrator developed at the European Southern Observatory (ESO), which is now operating in the Paranal Observatory (Chile). DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5299108