Vibrations in MagAO: resonance sources identification and first approaches for modeling and control

Javier Garcés; Sebastián Zúñiga; Laird Close; Jared Males; Katie Morzinski; Pedro Escárate; Mario Castro; José Marchioni; Diego Rojas

doi:10.1117/12.2232777

27 July 2016 Vibrations in MagAO: resonance sources identification and first approaches for modeling and control

Javier Garcés; Sebastián Zúñiga; Laird Close; Jared Males; Katie Morzinski; Pedro Escárate; Mario Castro; José Marchioni; Diego Rojas

Author Affiliations +

Proceedings Volume 9909, Adaptive Optics Systems V; 99093G (2016) https://doi.org/10.1117/12.2232777
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

The Magellan Telescope Adaptive Optics System (MagAO) is subject to resonance effects induced by elements within the system instrumentation, such as fans and cooling pumps. Normalized PSDs are obtained through frequency-based analysis of closed-loop on-sky data, detecting and measuring vibration effects. Subsequently, a space-state model for the AO loop is obtained, using a standard AO loop scheme with an integrator-based controller and including the vibration effects as disturbances. Finally, a new control alternative is proposed, focusing on residual phase variance minimization through the design and simulation of an optimal LQG control approach.

Citation Download Citation

Javier Garcés, Sebastián Zúñiga, Laird Close, Jared Males, Katie Morzinski, Pedro Escárate, Mario Castro, José Marchioni, Diego Rojas, "Vibrations in MagAO: resonance sources identification and first approaches for modeling and control", Proc. SPIE 9909, Adaptive Optics Systems V, 99093G (27 July 2016); doi: 10.1117/12.2232777; https://doi.org/10.1117/12.2232777

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