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Proceedings Paper

The Large Binocular Telescope mount control system architecture
Author(s): David S. Ashby; Dan McKenna; Joar G. Brynnel; Tom Sargent; Dan Cox; John Little; Keith Powell; Gene Holmberg
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Paper Abstract

The Large Binocular Telescope (LBT) features dual 8.4 m diameter mirrors in a common elevation-over-azimuth mount. The LBT moves in elevation on two large crescent-shaped C-rings that are supported by radial hydrostatic bearing pads located near the four corners of the rectangular azimuth frame. The azimuth frame, in turn, is supported by four hydrostatic bearing pads and uses hydrodynamic roller bearings for centering. Each axis is gear driven by four large electric motors. In addition to precision optical motor encoders, each axis is equipped with Farrand Inductosyn strip encoders which yield 0.005 arcsecond resolution. The telescope weighs 580 metric tons and is designed to track with 0.03 arcsecond or better servo precision under wind speeds as high as 24 km/hr. Though the telescope is still under construction, the Mount Control System (MCS) has been routinely exercised to achieve First Light. The authors present a description of the unique, DSP-based synchronous architecture of the MCS and its capabilities.

Paper Details

Date Published: 27 June 2006
PDF: 8 pages
Proc. SPIE 6274, Advanced Software and Control for Astronomy, 627423 (27 June 2006); doi: 10.1117/12.671983
Show Author Affiliations
David S. Ashby, Large Binocular Telescope Observatory, Univ. of Arizona (United States)
Dan McKenna, Steward Observatory, Univ. of Arizona (United States)
Joar G. Brynnel, Large Binocular Telescope Observatory, Univ. of Arizona (United States)
Tom Sargent, Steward Observatory, Univ. of Arizona (United States)
Dan Cox, Steward Observatory, Univ. of Arizona (United States)
John Little, Large Binocular Telescope Observatory, Univ. of Arizona (United States)
Keith Powell, Steward Observatory, Univ. of Arizona (United States)
Gene Holmberg, Steward Observatory, Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 6274:
Advanced Software and Control for Astronomy
Hilton Lewis; Alan Bridger, Editor(s)

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