Contribution au développement d'une loi de guidage autonome par platitude. Application à une mission de rentrée atmosphérique.

Abstract : This thesis deals with the design of an autonomous guidance law based on flatness approach for atmospheric reentry vehicles. The autonomous guidance law proposed in this dissertation is based on flatness concept, in order to perform onboard processing so as to locally assign autonomy and responsibility to the vehicle, thus exempting the ground segment from ``low level'' operational tasks, so that it can ensure more efficiently its mission of global coordination. The first part of the manuscript deals with the formal characterization of flat outputs for nonlinear systems governed by ordinary differential equations, as well as for linear time-delay systems. A constructive algorithm is proposed in order to compute candidate delta-flat outputs within a standard formal computing environment. In the second part of the manuscript, a global and generic reentry trajectory replanning methodology is proposed in order to provide a fault-tolerance capability to the vehicle when subject to single/multiple control surface failures that could occur during the critical phases of an atmospheric reentry mission. In addition, a superellipsoidal annexion method is proposed so as to convexify the optimal control problem described in the flat outputs space. The proposed autonomous guidance law is then applied step by step to an atmospheric reentry mission for the US Space Shuttle orbiter STS-1.
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Theses
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https://tel.archives-ouvertes.fr/tel-00394728
Contributor : Vincent Morio <>
Submitted on : Saturday, November 24, 2018 - 2:05:17 AM
Last modification on : Friday, May 17, 2019 - 11:36:50 AM

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  • HAL Id : tel-00394728, version 3

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Vincent Morio. Contribution au développement d'une loi de guidage autonome par platitude. Application à une mission de rentrée atmosphérique.. Automatique / Robotique. Université Sciences et Technologies - Bordeaux I, 2009. Français. ⟨tel-00394728v3⟩

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