Computer Science
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991dncs.rept...89s&link_type=abstract
In ESA, Spacecraft Guidance, Navigation and Control Systems p 89-96 (SEE N92-24432 15-18)
Computer Science
Accuracy, Computerized Simulation, Control Systems Design, Nasa Space Programs, Reflectors, Algorithms, Feasibility Analysis, Requirements, Telescopes
Scientific paper
A system concept for a space based segmented reflector telescope figure control subsystem is described. The concept employs a two phase architecture in which figure initialization and figure maintenance are independent functions. Figure initialization is accomplished by image sharpening using natural reference targets. Figure maintenance is performed by monitoring the relative positions and alignments of the telescope components using an optical truss. Actuation is achieved using precision positioners. Computer simulation results of figure initialization by pairwise segment coalignment/cophasing and simulated annealing are presented along with figure maintenance results using a wavefront error regulation algorithm. Both functions are shown to perform at acceptable levels for the class of submillimeter telescopes that are serving as the focus of this technology development effort. Component breadboard work as well as plans for a system testbed are discussed.
Breckenridge W.
Kadogawa Hiroshi
Lau Ken
Levine Benjamin
Nerheim Noble
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