Control system modeling for the Thirty Meter Telescope primary mirror

Douglas G. MacMynowski; Peter M. Thompson; J. Chris Shelton; Lewis C. Roberts Jr.; M. Mark Colavita; Mark J. Sirota

doi:10.1117/12.914941

10 November 2011 Control system modeling for the Thirty Meter Telescope primary mirror

Douglas G. MacMynowski, Peter M. Thompson, J. Chris Shelton, Lewis C. Roberts Jr., M. Mark Colavita, Mark J. Sirota

Proceedings Volume 8336, Integrated Modeling of Complex Optomechanical Systems; 83360R (2011) https://doi.org/10.1117/12.914941
Event: Integrated Modeling of Complex Optomechanical Systems, 2011, Kiruna, Sweden

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.

Citation Download Citation

Douglas G. MacMynowski, Peter M. Thompson, J. Chris Shelton, Lewis C. Roberts Jr., M. Mark Colavita, and Mark J. Sirota "Control system modeling for the Thirty Meter Telescope primary mirror", Proc. SPIE 8336, Integrated Modeling of Complex Optomechanical Systems, 83360R (10 November 2011); https://doi.org/10.1117/12.914941

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