Computer Science – Performance
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993csit.nasa..263d&link_type=abstract
In NASA. Langley Research Center, The Fifth NASA/DOD Controls-Structures Interaction Technology Conference, Part 1 p 263-275 (SE
Computer Science
Performance
Feedback Control, Flexible Bodies, Large Space Structures, Performance Tests, Pointing Control Systems, Spaceborne Experiments, Displacement, Eigenvectors, Ground Tests, System Identification, X Ray Telescopes
Scientific paper
CASES (Controls, Astrophysics and Structures Experiment in Space) is a proposed space experiment to collect x-ray images of the galactic center and solar disk with unprecedented resolution. This requires precision pointing and suppression of vibrations in the long flexible structure that comprises the 32-m x-ray telescope optical bench. Two separate electro-optical sensor systems are provided for the ground test facility (GTF). The Boom Motion Tracker (BMT) measures eigenvector data for post-mission use in system identification. The Tip Displacement Sensor (TDS) measures boom tip position and is used as feedback for the closed-loop control system that stabilizes the boom. Both the BMT and the TDS have met acceptance specifications and were delivered to MSFC in February 1992. This paper describes the sensor concept, the sensor configuration as implemented in the GTF, and the results of characterization and performance testing.
Bukley Angelia P.
Davis Hugh W.
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