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Orientation and shape-control of an orbiting flexible beam under the influence of solar radiation pressureIn this paper, the uncontrolled and controlled dynamics of a thin flexible beam in orbit and in the presence of solar radiation disturbance are analyzed. A beam nominally oriented along (i) the local horizontal and carrying a gimballed rigid dumbbell for gravity stabilization, and (ii) a beam nominally oriented along the local vertical are considered. The uncontrolled dynamics of the beam in the presence of the solar radiation pressure disturbance shows the excitation of the rigid pitch mode. The control laws previously designed for the case where the environmental effects were neglected, are found to be inadequate to control the shape and orientation of very flexible beams that are exposed to solar radiation disturbances. The control laws and the gain parameters are reevaluated for both cases of nominal beam orientations; this results, in general, in increased robustness of the closed-loop system. Methods of obtaining a robust control system in the presence of environmental perturbations are discussed.
Document ID
19840047752
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Krishna, R.
(Howard Univ. Washington, DC, United States)
Bainum, P. M.
(Howard University Washington, DC, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1984
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
AAS PAPER 83-325
Accession Number
84A30539
Funding Number(s)
CONTRACT_GRANT: NSG-1414
Distribution Limits
Public
Copyright
Other

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