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Proceedings Paper

Parametric modeling and control of telescope wind-induced vibration
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Paper Abstract

A parametric model of the dynamic performance of an optical telescope due to wind-buffeting is presented. The model is being developed to support the design of next generation segmented-mirror optical telescopes through enabling rapid design iterations and allowing a more thorough exploration of the design space. A realistic performance assessment requires parametric descriptions of the wind, the structural dynamics, active control of the structure, and the optical response. The current model and its assumptions are presented, with the primary emphasis being on the parameterization of the wind forces. Understanding the temporal spectrum and spatial distribution of wind disturbances inside the telescope enclosure is one of the most challenging aspects in developing the overall parametric model. This involves integrating information from wind tunnel tests, computational fluid dynamics, and measurements at existing observatories. The potential and limitations of control to mitigate the response are also discussed, with realistic constraints on the control bandwidth obtained from the detailed structural model of a particular point design. Finally, initial results are presented on performance trends with a few key parameter variations.

Paper Details

Date Published: 16 September 2004
PDF: 12 pages
Proc. SPIE 5497, Modeling and Systems Engineering for Astronomy, (16 September 2004); doi: 10.1117/12.552282
Show Author Affiliations
Douglas G. MacMynowski, California Institute of Technology (United States)
George Z. Angeli, AURA-Association of Universities for Research in Astronomy, Inc. (United States)
Konstantinos Vogiatzis, AURA-Association of Universities for Research in Astronomy, Inc. (United States)
Joeleff Fitzsimmons, National Research Council (Canada)
Stephen Padin, Univ. of Chicago (United States)

Published in SPIE Proceedings Vol. 5497:
Modeling and Systems Engineering for Astronomy
Simon C. Craig; Martin J. Cullum, Editor(s)

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