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Dynamic analysis of TMT

MacMynowski, Douglas G. and Blaurock, Carl and Angeli, George Z. (2008) Dynamic analysis of TMT. In: Modeling, Systems Engineering, and Project Management for Astronomy III. Proceedings of SPIE. No.7017. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 70170W. ISBN 9780819472274. http://resolver.caltech.edu/CaltechAUTHORS:20181113-160522072

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Abstract

Dynamic disturbance sources affecting the optical performance of the Thirty Meter Telescope (TMT) include unsteady wind forces inside the observatory enclosure acting directly on the telescope structure, unsteady wind forces acting on the enclosure itself and transmitted through the soil and pier to the telescope, equipment vibration either on the telescope itself (e.g. cooling of instruments) or transmitted through the soil and pier, and potentially acoustic forces. We estimate the characteristics of these disturbance sources using modeling anchored through data from existing observatories. Propagation of forces on the enclosure or in support buildings through the soil and pier to the telescope base are modeled separately, resulting in force estimates at the telescope pier. We analyze the resulting optical consequences using integrated modeling that includes the telescope structural dynamics, control systems, and a linear optical model. The dynamic performance is given as a probability distribution that includes the variation of the external wind speed and observing orientation with respect to the wind, which can then be combined with dome seeing and other time- or orientation-dependent components of the overall error budget. The modeling predicts acceptable dynamic performance of TMT.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.786935DOIArticle
ORCID:
AuthorORCID
MacMynowski, Douglas G.0000-0003-1987-9417
Additional Information:© 2008 Society of Photo-optical Instrumentation Engineers (SPIE). The TMT Project gratefully acknowledges the support of the TMT partner institutions. They are the Association of Canadian Universities for Research in Astronomy (ACURA), the California Institute of Technology and the University of California. This work was supported as well by the Gordon and Betty Moore Foundation, the Canada Foundation for Innovation, the Ontario Ministry of Research and Innovation, the National Research Council of Canada, the Natural Sciences and Engineering Research Council of Canada, the British Columbia Knowledge Development Fund, the Association of Universities for Research in Astronomy (AURA) and the U.S. National Science Foundation.
Group:Thirty Meter Telescope
Funders:
Funding AgencyGrant Number
Association of Canadian Universities for Research in Astronomy (ACURA)UNSPECIFIED
Caltech`
University of CaliforniaUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Canada Foundation for InnovationUNSPECIFIED
Ontario Ministry of Research and InnovationUNSPECIFIED
National Research Council of CanadaUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
British Columbia Knowledge Development FundUNSPECIFIED
Association of Universities for Research in Astronomy (AURA)UNSPECIFIED
NSFUNSPECIFIED
Subject Keywords:Extremely Large Telescopes, Performance Modeling, Wind Buffeting, Vibration
Record Number:CaltechAUTHORS:20181113-160522072
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20181113-160522072
Official Citation:Douglas G. MacMynowski, Carl Blaurock, George Z. Angeli, "Dynamic analysis of TMT," Proc. SPIE 7017, Modeling, Systems Engineering, and Project Management for Astronomy III, 70170W (9 July 2008)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:90881
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:14 Nov 2018 00:20
Last Modified:14 Nov 2018 00:20

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