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<dc:title xml:lang="fr">Contribution à la modélisation, l'identification et la commande d'un hélicoptère miniature</dc:title>
<dcterms:alternative xml:lang="en">Contribution to small-scale helicopter modeling, identification and control</dcterms:alternative>
<dc:subject xml:lang="fr">Hélicoptère</dc:subject>
<dc:subject xml:lang="fr">Structure coaxiale</dc:subject>
<dc:subject xml:lang="fr">Mécanique du vol</dc:subject>
<dc:subject xml:lang="fr">Modélisation</dc:subject>
<dc:subject xml:lang="fr">Identification des systèmes</dc:subject>
<dc:subject xml:lang="fr">Estimation de paramètres</dc:subject>
<dc:subject xml:lang="fr">Commande en cascade</dc:subject>
<dc:subject xml:lang="fr">Autopilote</dc:subject>
<dc:subject xml:lang="en">Helicopter</dc:subject>
<dc:subject xml:lang="en">Coaxial structure</dc:subject>
<dc:subject xml:lang="en">Flight mechanics</dc:subject>
<dc:subject xml:lang="en">Modeling</dc:subject>
<dc:subject xml:lang="en">System identification</dc:subject>
<dc:subject xml:lang="en">Parameter estimation</dc:subject>
<dc:subject xml:lang="en">Cascaded control</dc:subject>
<dc:subject xml:lang="en">Autopilot</dc:subject>
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<tef:elementdEntree autoriteExterne="027830810" autoriteSource="Sudoc">Vol aux instruments</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="027425401" autoriteSource="Sudoc">Identification des systèmes</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">La stabilisation et l’automatisation du vol de tout véhicule aérien nécessite la mise en oeuvre d’algorithmes de commande. La synthèse et la simulation des lois de commande reposent sur un modèle mathématique du véhicule, qui doit être de complexité et de précision appropriées. Cette thèse présente une méthodologie complète d’identification appliquée à un hélicoptère coaxialminiature. L’étude théorique de son comportement en vol permet d’établir plusieurs modèles basés sur la mécanique du vol, qui diffèrent par les phénomènes aérodynamiques pris en compte. Ils sont identifiés, comparés et validés grâce à des données de vol, mettant en évidence l’importance de certains phénomènes dans la précision du modèle. Différentes lois de commande sont alors étudiées et évaluées en simulation puis par des expérimentations sur un prototype. Les résultats obtenus sont conformes aux simulations numériques, validant ainsi l’ensemble de la démarche.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Control algorithms are at the heart of the stability and automatic flight capabilities of any aerial vehicle. Synthesis and simulation of control laws are based on a mathematicalmodel of the vehicle, which must be a trade-off between simplicity and accuracy. This work presents a complete system identification methodology applied on a miniature coaxial helicopter. Based on flight mechanics and aerodynamics, several models are built. They differ in the aerodynamic phenomena taken into account. They are identified, compared and validated thanks to flight data, highlighting important phenomena in the accuracy of the model. Several flight control strategies are then studied and evaluated through simulations and experiments with a prototype. The results are in accordance with numerical simulations, thus validating the whole approach.</dcterms:abstract>
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