title: Frequency based design of modal controllers for adaptive optics systems.
abstract: This paper addresses the problem of reducing the effects of wavefront distortions in ground-based telescopes within a "Modal-Control" framework. The proposed approach allows the designer to optimize the Youla parameter of a given modal controller with respect to a relevant adaptive optics performance criterion defined on a "sampled" frequency domain. This feature makes it possible to use turbulence/vibration profiles of arbitrary complexity (even empirical power spectral densities from data), while keeping the controller order at a moderate value. Effectiveness of the proposed solution is also illustrated through an adaptive optics numerical simulator.
authors.affiliation: Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, Firenze, Italy.
authors.forename: Guido
authors.initials: G
authors.lastname: Agapito
authors.forename: Giorgio
authors.initials: G
authors.lastname: Battistelli
authors.forename: Daniele
authors.initials: D
authors.lastname: Mari
authors.forename: Daniela
authors.initials: D
authors.lastname: Selvi
authors.forename: Alberto
authors.initials: A
authors.lastname: Tesi
authors.forename: Pietro
authors.initials: P
authors.lastname: Tesi
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D008962:Models, Theoretical; D017711:Nonlinear Dynamics; D055096:Optical Devices; D010363:Pattern Recognition, Automated / Q000379:methods*