Accounting for mirror dynamics in optimal Adaptive Optics control

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2014

Autores

Correia C. (Autor) FCUP; Raynaud H.F. (Autor) Outra; Kulcsar C. (Autor) Outra; Conan J.M. (Autor) Outra

Ata de Conferência Internacional

Título: 2009 European Control Conference, ECC 2009

Páginas: 3515-3520

2009 10th European Control Conference, ECC 2009

23 August 2009 through 26 August 2009

Indexação

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-014-ZBT

DOI: 10.23919/ecc.2009.7074944

Abstract (EN): Adaptive Optics (AO) systems use a Deformable Mirror (DM) to counter in real-time the nefarious effects of atmospheric turbulence on ground-based telescopes images. This article presents a brief historical overview of AO design, seen as a strongly multi-variable minimum-variance (MVP) disturbance rejection problem associated with a hybrid continuous/ discrete time MV control problem. It is shown that for a wide class of LTI DM and turbulence models, this hybrid MV problem can be transformed into an equivalent discrete-time LQG formulation. A discrete-time stochastic model enables to compute the optimal control in standard reconstructed feedback form and to evaluate performance degradation for simpler suboptimal solutions. An example to tip-tilt DM control for the European Extremely Large Telescope (E-ELT) is presented.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5