Integrated modeling of a laboratory setup for a large deformable mirror

Rikard Heimsten; Torben Andersen; Mette Owner-Petersen; Douglas G. MacMynowski

doi:10.1117/12.915571

10 November 2011 Integrated modeling of a laboratory setup for a large deformable mirror

Rikard Heimsten, Torben Andersen, Mette Owner-Petersen, Douglas G. MacMynowski

Proceedings Volume 8336, Integrated Modeling of Complex Optomechanical Systems; 83360N (2011) https://doi.org/10.1117/12.915571
Event: Integrated Modeling of Complex Optomechanical Systems, 2011, Kiruna, Sweden

Abstract

We study a concept for a low-cost, large deformable mirror for an Extremely Large Telescope. The use of inexpensive voice-coil actuators leads to a poorly damped faceplate, with many modes within the desired control bandwidth. A control architecture, including rate and position feedback to add damping and stiness, for the faceplate has been presented in our previous papers. An innovative local control scheme which decouples adjacent actuators and suppresses low-order eigenmodes is a key feature in our controller. Here, we present an integrated model of a partially illuminated large deformable mirror in an experimental laboratory setup with a limited amount of actuators. From the model, conclusions are drawn regarding the number of actuators needed to identify the key features, such as local control performance, dynamic range, and controllability and robustness of the deformable mirror.

Citation Download Citation

Rikard Heimsten, Torben Andersen, Mette Owner-Petersen, and Douglas G. MacMynowski "Integrated modeling of a laboratory setup for a large deformable mirror", Proc. SPIE 8336, Integrated Modeling of Complex Optomechanical Systems, 83360N (10 November 2011); https://doi.org/10.1117/12.915571

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