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Proceedings Paper

An iterative model-based cogging compensator for the Green Bank Telescope servo system
Author(s): Timothy Franke; Timothy Weadon; John Ford; Mario Garcia-Sanz
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Paper Abstract

This paper outlines an anti-cogging methodology and summarizes the current state of motor cogging cancellation on the Green Bank Telescope (GBT). An iterative, model-based algorithm is developed for finding the anticogging signal which yields rapid convergence. This method fills a gap in present methodologies in that it can serve as a drop-in cogging solution which operates in the presence of unknown structural dynamics as well as with an existing feedback controller. The algorithm is described and demonstrated on a 40 HP DC brushed motor test bed and also on the GBT’s elevation axis motors. Results and implementation experience from deploying the algorithm on a motor test bed and on the GBT are discussed.

Paper Details

Date Published: 22 July 2014
PDF: 11 pages
Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 914555 (22 July 2014); doi: 10.1117/12.2056704
Show Author Affiliations
Timothy Franke, Case Western Reserve Univ. (United States)
Timothy Weadon, National Radio Astronomy Observatory (United States)
John Ford, National Radio Astronomy Observatory (United States)
Mario Garcia-Sanz, Case Western Reserve Univ. (United States)

Published in SPIE Proceedings Vol. 9145:
Ground-based and Airborne Telescopes V
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

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