Abstract. In this paper we present a study on the Collision-Avoidance mode of a formation flying satellite pair in which a free-flying chief spacecraft follows temporary off-nominal conditions and a controlled deputy spacecraft performs collision avoidance maneuvers. The Collision-Avoidance strategy consists in a Separation Guidance and a Nominal Guidance. The Separation Guidance is in charge of the avoidance of a predicted collision soon to occur, and it is based on a computationally simple, deterministic and closed-form algorithm, so that a valid solution is always available without delay. The Nominal Guidance uses Genetic Algorithms and it takes charge of placing the deputy spacecraft in a bounded safe or “parking” trajectory, while minimizing the propellant consumption and avoiding the evaporation of the formation. The performances of a Linear Quadratic Regulator and a Model Predictive Control are also compared in tracking the reference trajectories provided by the Collision- Avoidance strategy.

Guidance and Control Strategies for the Collision-Avoidance Mode of a Satellite Pair Flying in Formation

VALMORBIDA, ANDREA;LORENZINI, ENRICO;
2011

Abstract

Abstract. In this paper we present a study on the Collision-Avoidance mode of a formation flying satellite pair in which a free-flying chief spacecraft follows temporary off-nominal conditions and a controlled deputy spacecraft performs collision avoidance maneuvers. The Collision-Avoidance strategy consists in a Separation Guidance and a Nominal Guidance. The Separation Guidance is in charge of the avoidance of a predicted collision soon to occur, and it is based on a computationally simple, deterministic and closed-form algorithm, so that a valid solution is always available without delay. The Nominal Guidance uses Genetic Algorithms and it takes charge of placing the deputy spacecraft in a bounded safe or “parking” trajectory, while minimizing the propellant consumption and avoiding the evaporation of the formation. The performances of a Linear Quadratic Regulator and a Model Predictive Control are also compared in tracking the reference trajectories provided by the Collision- Avoidance strategy.
Proceedings of 3rd CEAS Air & Space Conference
9788896427187
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2479880
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