27 June 2006 Real-time control system for the Keck Interferometer Nuller: methods and maintenance
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Abstract
The real-time control system for the Keck Interferometer Nuller provides the N-band fringe tracking capabilities of the instrument, as well as correcting for atmospheric dispersion in the system. There are three closed-loop servos for controlling the N-band path, as well as two K-band servos which provide open-loop control. A system of synchronized "gates" allows all N-band fringe trackers to operate simultaneously, making it possible to interleave servo corrections with data collection. Several methods of improving servo performance and maintenance of control schemes are discussed.
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Jean I. Garcia, M. Mark Colavita, Andrew J. Booth, "Real-time control system for the Keck Interferometer Nuller: methods and maintenance", Proc. SPIE 6274, Advanced Software and Control for Astronomy, 62740K (27 June 2006); doi: 10.1117/12.670618; https://doi.org/10.1117/12.670618
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