Translator Disclaimer
Paper
20 October 2004 Optimal distributed prediction and estimation controller with application to adaptive optics and optical interferometry
Author Affiliations +
Abstract
In this paper we address the problem of designing a controller to compensate for phase errors in an array of ground based telescopes, subject to atmospheric distortion. Since the observations from the telescopes are coherently combined to improve resolution, this problem calls for two classes of control loops: a) local control on each telescope to compensate for random phase distortions, b) global control to align all phases coherently so that the array would act as a virtual telescope with a large aperture. By proper use of frequency decomposition, we show that a globally stable system can be designed where the local and global control systems are decoupled. This is obtained by assigning the control of high frequency disturbances to the local controller, and the overall control of low frequency disturbances to the global control system. These two controllers work at different sampling frequencies and can be decoupled using well known results from Multi Rate Processing techniques used as the basis of Quadrature Mirror Filters and Wavelets decompositions. The feasibility of this approach will be tested using data from the Naval Prototype Optical Interferometer (NPOI) in Flagstaff, AZ (USA).
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Roberto Cristi, Sergio Raffaele Restaino, and Janet L. Le Blanc "Optimal distributed prediction and estimation controller with application to adaptive optics and optical interferometry", Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); https://doi.org/10.1117/12.548610
PROCEEDINGS
8 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

Development of new concepts to minimize the impact of fast...
Proceedings of SPIE (September 13 2012)
Large aperture mirror array (LAMA): project overview
Proceedings of SPIE (July 07 2004)
Adaptive optics control system development
Proceedings of SPIE (December 24 2003)
Adaptive Telescope Design Using Computer Tools
Proceedings of SPIE (October 28 1985)
Fully active telescope
Proceedings of SPIE (January 30 2004)

Back to Top