Accounting for mirror dynamics in optimal Adaptive Optics control

• Type: Article in International Conference Proceedings Book
• Date: 2014

Authors

Correia C. (Author) FCUP; Raynaud H.F. (Author) Other; Kulcsar C. (Author) Other; Conan J.M. (Author) Other

Conference proceedings International

Title: 2009 European Control Conference, ECC 2009

Pages: 3515-3520

2009 10th European Control Conference, ECC 2009

23 August 2009 through 26 August 2009

Indexing

Scopus - 0 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5