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A more accurate modeling of the effects of actuators in large space structuresThe paper deals with finite actuators. A nonspinning three-axis stabilized space vehicle having a two-dimensional large structure and a rigid body at the center is chosen for analysis. The torquers acting on the vehicle are modeled as antisymmetric forces distributed in a small but finite area. In the limit they represent point torquers which also are treated as a special case of surface distribution of dipoles. Ordinary and partial differential equations governing the forced vibrations of the vehicle are derived by using Hamilton's principle. Associated modal inputs are obtained for both the distributed moments and the distributed forces. It is shown that the finite torquers excite the higher modes less than the point torquers. Modal cost analysis proves to be a suitable methodology to this end.
Document ID
19810050349
Document Type
Reprint (Version printed in journal)
Authors
Hablani, H. B.
Date Acquired
August 11, 2013
Publication Date
April 1, 1981
Publication Information
Publication: Acta Astronautica
Volume: 8
Subject Category
SPACECRAFT DESIGN, TESTING AND PERFORMANCE
Funding Number(s)
CONTRACT_GRANT: JPL-955639
Distribution Limits
Public
Copyright
Other