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Modeling wind-buffeting of the Thirty Meter Telescope

MacMynowski, Douglas G. and Blaurock, Carl and Angeli, George Z. and Vogiatzis, Konstantinos (2006) Modeling wind-buffeting of the Thirty Meter Telescope. In: Modeling, Systems Engineering, and Project Management for Astronomy II. Proceedings of SPIE. No.6271. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 62710M. ISBN 9780819463364. https://resolver.caltech.edu/CaltechAUTHORS:20190712-144443930

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Abstract

The Thirty Meter Telescope project is designing a 30m diameter ground-based optical telescope. Unsteady wind loads on the telescope structure due to turbulence inside the telescope enclosure impact the delivered image quality. A parametric model is described that predicts the optical performance due to wind with sufficient accuracy to inform relevant design decisions, including control bandwidths. The model is designed to be sufficiently computationally efficient to allow rapid exploration of the impact of design parameters or uncertain/variable input parameters, and includes (i) a parametric wind model, (ii) a detailed structural dynamic model derived from a finite element model, (iii) a linear optical response model, and (iv) a control model. Model predictions with the TMT structural design are presented, including the parametric variation of performance with external wind speed, desired wind speed across the primary mirror, and optical guide loop bandwidth. For the median mountaintop wind speed of 5.5 m/s, the combination of dome shielding, minimized cross-sectional area, and control results in acceptable image degradation.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.672706DOIArticle
ORCID:
AuthorORCID
MacMynowski, Douglas G.0000-0003-1987-9417
Additional Information:© 2006 Society of Photo-Optical Instrumentation Engineers (SPIE). The authors gratefully acknowledge the support of the TMT partner institutions. They are the Association of Canadian Universities for Research in Astronomy (ACURA), the Association of Universities for Research in Astronomy (AURA), the California Institute of Technology and the University of California. This work was supported, as well, by the Canada Foundation for Innovation, the Gordon and Betty Moore Foundation, the National Optical Astronomy Observatory, which is operated by AURA under cooperative agreement with the National Science Foundation, the Ontario Ministry of Research and Innovation, and the National Research Council of Canada.
Group:Thirty Meter Telescope
Funders:
Funding AgencyGrant Number
Association of Canadian Universities for Research in Astronomy (ACURA)UNSPECIFIED
Association of Universities for Research in Astronomy (AURA)UNSPECIFIED
CaltechUNSPECIFIED
University of CaliforniaUNSPECIFIED
Canada Foundation for InnovationUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
National Optical Astronomy Observatory (NOAO)UNSPECIFIED
NSFUNSPECIFIED
Ontario Ministry of Research and InnovationUNSPECIFIED
National Research Council of CanadaUNSPECIFIED
Series Name:Proceedings of SPIE
Issue or Number:6271
Record Number:CaltechAUTHORS:20190712-144443930
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190712-144443930
Official Citation:Douglas G. MacMynowski, Carl Blaurock, George Z. Angeli, and Konstantinos Vogiatzis "Modeling wind-buffeting of the Thirty Meter Telescope", Proc. SPIE 6271, Modeling, Systems Engineering, and Project Management for Astronomy II, 62710M (22 June 2006); https://doi.org/10.1117/12.672706
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97136
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:12 Jul 2019 22:02
Last Modified:03 Oct 2019 21:28

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