The Woofer-Tweeter experiment

Details The Woofer-Tweeter experiment The Woofer-Tweeter experiment

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spie.6272e..56c&link_type=abstract

Advances in Adaptive Optics II. Edited by Ellerbroek, Brent L.; Bonaccini Calia, Domenico. Proceedings of the SPIE, Volume 6272

Physics

Optics

1

Scientific paper

The Woofer-Tweeter experiment started in the Adaptive Optics Laboratory of the University of Victoria in February 2005 has recently achieved completion. The goal of this experiment is to validate the woofer-tweeter AO concept i.e. instead to have a single deformable mirror conjugated at the ground, two DMs conjugated at the ground are used to achieve both the necessary stroke and actuators density required for a single DM for an ELT. Recently, the loop has been closed on the turbulence with a loop rate of 100Hz. Two closed-loop controllers have been tested so far: a global integrator and a tweeter off-loading integrator. This paper describes the UVic Woofer-Tweeter bench layout and components and the Woofer-Tweeter simulation tool used to both model and control the experiment. A glimpse on the very first results from the closed-loop operations is also given.

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