WSEAS Transactions on Systems
Print ISSN: 1109-2777, E-ISSN: 2224-2678
Volume 13, 2014
Special Issue: Nonlinear Dynamics, Dynamical Systems and Processes Editors: A. V. Doroshin, F. Neri Dynamical Analysis and Synthesis of Inertia-Mass Configurations of a Spacecraft with Variable Volumes of Liquids in Jet Engine Tanks
Authors: ,
Abstract: In the article the attitude motion of a spacecraft with variable mass/structure is considered at the variability of the volume of liquids (the fuel and the oxidizer) in tanks of the jet engines. The variability of the liquid’s volume is occurred under the action of systems of the extrusion of liquids by the pressure creation and, as a result, by the diaphragm (a thin soft foil) deformation inside the fuel/oxidizer tank. The synthesis of the attitude dynamics is fulfilled by the change of directions of the extrusion of the liquids in tanks – this modifies the inertia-mass parameters (their corresponding time-dependencies) and affects the final motion dynamics. Here we showed that the extrusion in the lateral radial ―outside‖ direction is most preferable in comparison with the longitudinal extrusion (in the direction of jet-vector). It means that the precession cone of the longitudinal axis of the spacecraft (the axis of the jet-engine reactive thrust) is ―twisted up‖ to the precalculated necessary direction of jet-impulse, and it has not ―untwisted‖ phases. This scheme of the liquid extrusion is dynamically optimal, because it allows to improve the active inter-orbital maneuver by the natural/uncontrolled/passive way.
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Keywords: Spacecraft, Variability of the Volume of Liquids, Tanks of the Jet-Engines, Attitude Dynamics, The Curvature Method, Precession Motion
Pages: 690-698
WSEAS Transactions on Systems, ISSN / E-ISSN: 1109-2777 / 2224-2678, Volume 13, 2014, Art. #69