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Equations of motion for a flexible spacecraft-lumped parameter idealizationThe equations of motion for a flexible vehicle capable of arbitrary translational and rotational motions in inertial space accompanied by small elastic deformations are derived in an unabridged form. The vehicle is idealized as consisting of a single rigid body with an ensemble of mass particles interconnected by massless elastic structure. The internal elastic restoring forces are quantified in terms of a stiffness matrix. A transformation and truncation of elastic degrees of freedom is made in the interest of numerical integration efficiency. Deformation dependent terms are partitioned into a hierarchy of significance. The final set of motion equations are brought to a fully assembled first order form suitable for direct digital implementation. A FORTRAN program implementing the equations is given and its salient features described.
Document ID
19910019897
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Storch, Joel (Draper (Charles Stark) Lab., Inc. Cambridge, MA, United States)
Gates, Stephen (Draper (Charles Stark) Lab., Inc. Cambridge, MA, United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1982
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
NAS 1.26:188727
NASA-CR-188727
CSDL-R-1582
Accession Number
91N29211
Funding Number(s)
CONTRACT_GRANT: NAS9-16023
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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