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Proceedings Paper

SIM Lite Guide-2 telescope system identification, control design and pointing performance evaluation
Author(s): Joel F. Shields; Dhemetrio Boussalis; Nanaz Fathpour; Mark Weilert; Inseob Hahn; Asif Ahmed
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Paper Abstract

The Guide-2 telescope (G2T) is an important subsystem of the new SIM Lite Astrometric Observatory. In this paper we present system identification experiments, design and implementation of the G2T stellar pointing loop that achieves milliarcsecond resolution of spacecraft attitude. Special emphasis was placed on characterization and modeling of PZT hysteresis since this nonlinearity plays an important part in the control loop performance. Power spectral densities of the star image centroids were use to evaluate the pointing loop performance with and with out the presence of simulated ACS disturbances injected via a fast steering mirror (FSM).

Paper Details

Date Published: 22 July 2010
PDF: 13 pages
Proc. SPIE 7734, Optical and Infrared Interferometry II, 77341L (22 July 2010); doi: 10.1117/12.857716
Show Author Affiliations
Joel F. Shields, Jet Propulsion Lab. (United States)
Dhemetrio Boussalis, Jet Propulsion Lab. (United States)
Nanaz Fathpour, Jet Propulsion Lab. (United States)
Mark Weilert, Jet Propulsion Lab. (United States)
Inseob Hahn, Jet Propulsion Lab. (United States)
Asif Ahmed, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 7734:
Optical and Infrared Interferometry II
William C. Danchi; Françoise Delplancke; Jayadev K. Rajagopal, Editor(s)

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