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Control System Modeling for the Thirty Meter Telescope Primary Mirror

MacMynowski, Douglas G. and Thompson, Peter M. and Shelton, J. Chris and Roberts, Lewis C., Jr. and Colavita, M. Mark and Sirota, Mark J. (2011) Control System Modeling for the Thirty Meter Telescope Primary Mirror. In: Integrated Modeling of Complex Optomechanical Systems. Proceedings of SPIE. No.8336. Society of Photo-Optical Instrumentation Engineers , Bellingham, Washington, Art. No. 83360R. ISBN 978-0-81948-993-7. http://resolver.caltech.edu/CaltechAUTHORS:20120406-153858986

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Abstract

The Thirty Meter Telescope primary mirror is composed of 492 segments that are controlled to high precision in the presence of wind and vibration disturbances, despite the interaction with structural dynamics. The higher bandwidth and larger number of segments compared with the Keck telescopes requires greater attention to modeling to ensure success. We focus here on the development and validation of a suite of quasi-static and dynamic modeling tools required to support the design process, including robustness verification, performance estimation, and requirements flowdown. Models are used to predict the dynamic response due to wind and vibration disturbances, estimate achievable bandwidth in the presence of control-structure-interaction (CSI) and uncertainty in the interaction matrix, and simulate and analyze control algorithms and strategies, e.g. for control of focus-mode, and sensor calibration. Representative results illustrate TMT performance scaling with parameters, but the emphasis is on the modeling framework itself.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1117/12.914941DOIUNSPECIFIED
http://spiedigitallibrary.org/proceedings/resource/2/psisdg/8336/1/83360R_1?isAuthorized=noPublisherUNSPECIFIED
ORCID:
AuthorORCID
MacMynowski, Douglas G.0000-0003-1987-9417
Roberts, Lewis C., Jr.0000-0003-3892-2900
Additional Information:© 2011 Society of Photo-Optical Instrumentation Engineers. Online Nov 10, 2011. 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. JCS, LCR, and MMC are employed at the Jet Propulsion Laboratory, California Institute of Technology, which is operated under contract for NASA.
Group:Thirty Meter Telescope
Funders:
Funding AgencyGrant Number
Association of Canadian Universities for Research in Astronomy (ACURA)UNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Canada Foundation for Innovation (CFI) UNSPECIFIED
Ontario Ministry of Research and InnovationUNSPECIFIED
National Research Council of CanadaUNSPECIFIED
British Columbia Knowledge Development FundUNSPECIFIED
Association of Universities for Research in Astronomy (AURA)UNSPECIFIED
NSFUNSPECIFIED
CaltechUNSPECIFIED
University of CaliforniaUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
NASA/JPL/CaltechUNSPECIFIED
Subject Keywords:Extremely Large Telescopes, Control Systems, Uncertainty, Dynamics
Record Number:CaltechAUTHORS:20120406-153858986
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120406-153858986
Official Citation:Douglas G. MacMynowski, Peter M. Thompson, J. C. Shelton, Lewis C. Roberts, Jr., M. M. Colavita and Mark J. Sirota, "Control system modeling for the Thirty Meter Telescope primary mirror", Proc. SPIE 8336, 83360R (2011); http://dx.doi.org/10.1117/12.914941
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:30024
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:16 Apr 2012 15:05
Last Modified:24 Apr 2017 21:22

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