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Contributions au guidage pour le rendez-vous spatial par résolution du problème de commande optimale impulsionnelle

Christophe Louembet 1
1 LAAS-MAC - Équipe Méthodes et Algorithmes en Commande
LAAS - Laboratoire d'analyse et d'architecture des systèmes
Abstract : This manuscript of Habilitation à Diriger des Recherches deals with the guidance for spacecraft rendezvous. The orbital rendezvous consists in docking two spacecraft originating from their initial relative position and speed in free or fixed time. More generally, rendezvous guidance means computing all the maneuvers performed in the relative motion context. The relative motion describes the motion of a "chaser" spacecraft with thrust abilities in reference frame attached to the inert spacecraft in its orbit and called "target" spacecraft. The propulsion mode of the chaser being chemical, it is supposed to provide strong acceleration on small period of time with the respect to orbital period. These high thrusts allow a rapid evolution of the speed during these intervals. The difference of scale between the orbital dynamics and the speed evolution leads us to consider that the chemical propulsion causes instantaneous jumps in the speed history from the orbital motion point of view. The rendezvous guidance problem is described in this manuscript as an optimal control problem addressed from different perspectives. It is, at first, considered unconstrained and treated by solving the Neustadt problem. Then technological restrictions on the relative movement are accounted such as visibility conditions, collision avoidance, thusters limitations and uncertainties on the navigation data and the control misexecution. In this context, the so-called direct methods for solving the optimal control problem are put in place while providing certificates of constraint satisfaction.
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Submitted on : Wednesday, December 19, 2018 - 3:26:14 PM
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Christophe Louembet. Contributions au guidage pour le rendez-vous spatial par résolution du problème de commande optimale impulsionnelle. Automatique / Robotique. Université Toulouse 3 Paul Sabatier (UT3 Paul Sabatier), 2017. ⟨tel-01960763⟩



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