Dynamic analyses are presented of a spin-stabilized spacecraft that can be regarded as a rigid central body with several deployed cables. Firstly, the normal modes analysis is carried out of an isolated cable attached to a rigid body spinning at a constant angular velocity. This initial decomposition is reasonable as light cables attached to a massive central body behave independently as a first approximation and simplifies the derivation of the equations of motion. The three-dimensional wave equation in a rotating coordinate system is derived and solutions found using a lumped parameter approach. This analysis is novel as it presents an analysis technique to study the effect on the natural frequencies of physical characteristics (that is vibration planes containing and normal to the spin axis) and varying design parameters (that is cable length, cable density, tip mass) are considered. The study is then extended to consider the interaction of the cables and the central body for a system that is not subjected to external torques.
Natural Frequencies of a Rotating Cable/Spacecraft System
1991-07-01
11 pages
Article (Journal)
Electronic Resource
English
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