Geometric Numerical Integration for Complex Dynamics of Tethered Spacecraft

Details Geometric Numerical Integration for Complex Dynamics of Tethered Spacecraft Geometric Numerical Integration for Complex Dynamics of Tethered Spacecraft

2010-10-08

arxiv.org/abs/1010.1724v1

Mathematics

Dynamical Systems

Scientific paper

This paper presents an analytical model and a geometric numerical integrator for a tethered spacecraft model that is composed of two rigid bodies connected by an elastic tether. This model includes important dynamic characteristics of tethered spacecraft in orbit, namely the nonlinear coupling between deformations of tether, rotational dynamics of rigid bodies, a reeling mechanism, and orbital dynamics. A geometric numerical integrator, referred to as a Lie group variational integrator, is developed to numerically preserve the Hamiltonian structure of the presented model and its Lie group configuration manifold. The structure-preserving properties are particularly useful for studying complex dynamics of a tethered spacecraft over a long period of time. These properties are illustrated by numerical simulations.

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