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Torben Anderssen. Profile picture.

Torben Andersen

Professor emeritus

Torben Anderssen. Profile picture.

Integrated Modeling of a Laboratory Setup for a Large Deformable Mirror

Author

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

Summary, in English

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 stiffness, 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.

Department/s

  • Lund Observatory

Publishing year

2011

Language

English

Pages

83360-83360

Publication/Series

Integrated Modeling of Complex Optomechanical Systems

Volume

8336

Document type

Conference paper

Publisher

SPIE

Topic

  • Astronomy, Astrophysics and Cosmology

Keywords

  • local control
  • active damping
  • deformable mirror
  • distributed control
  • Adaptive optics

Conference name

Conference on Integrated Modeling of Complex Optomechanical Systems

Conference date

2011-08-15 - 2011-08-17

Conference place

Kiruna, Sweden

Status

Published

ISBN/ISSN/Other

  • ISSN: 0277-786X
  • ISSN: 1996-756X