Azimuth and elevation servo performance of the W.M. Keck Telescope

Mark J. Sirota; Peter M. Thompson; Henry R. Jex

doi:10.1117/12.176183

1 June 1994 Azimuth and elevation servo performance of the W.M. Keck Telescope

Mark J. Sirota, Peter M. Thompson, Henry R. Jex

Proceedings Volume 2199, Advanced Technology Optical Telescopes V; (1994) https://doi.org/10.1117/12.176183
Event: 1994 Symposium on Astronomical Telescopes and Instrumentation for the 21st Century, 1994, Kailua, Kona, HI, United States

Abstract

The azimuth and elevation sources of the W.M. Keck Telescope have been designed to meet stringent tracking, offsetting, and slewing requirements. The requirements and the achieved performance are presented. The feedback architecture of the position and rate loops is described. The analysis includes an identification of the telescope structure via frequency sweep test signals. The identified model is compared with the single resonance model used in the preliminary design. As expected there are numerous additional resonances, and the effects of these on performance and stability are discussed. The autoguider loop is also discussed. Shortcomings are noted and ideas for improved performance are examined.

Citation Download Citation

Mark J. Sirota, Peter M. Thompson, and Henry R. Jex "Azimuth and elevation servo performance of the W.M. Keck Telescope", Proc. SPIE 2199, Advanced Technology Optical Telescopes V, (1 June 1994); https://doi.org/10.1117/12.176183

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