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

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

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2199..126s&link_type=abstract

Proc. SPIE Vol. 2199, p. 126-141, Advanced Technology Optical Telescopes V, Larry M. Stepp; Ed.

Computer Science

Performance

1

Scientific paper

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.

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