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Absorbeurs de vibrations hybrides hyperstables

Authors: Chesné, Simon; Collette, C;

Absorbeurs de vibrations hybrides hyperstables

Abstract

L'hybridation des systèmes actifs et passifs est une voie en plein essor que ce soit pour l'isolation ou l'amortissement des structures. L'hybridation a pour objectif de combiner le meilleur des approches actives et passives. Les apports principaux sont généralement l'adaptabilité apportée au système passif initial mais également l' amélioration des performances a des couts énergétiques bien inférieurs aux versions purement actives. L'aspect fail-safe du système hybride est également un atout non négligeable dans le cadre des applications embarquées. Cependant certaines difficultés apparaissent lorsque l'on cherchè a coupler contrôle actif et contrôle passif au sein d'un même système mécanique notamment en terme de stabilité. On présente ici une loi de contrôle qui est une évolution du Direct Velocity Feedback appliquée aux absorbeurs de vibrations accordés. Deux pôles et deux zéros sont ajoutés a la loi de contrôle initiale, pour interagir avec la dynamique de la structure. L' intérêt de ces interactions est de modifier le lieu des pôles du système en boucle fermée afin de rendre le système contrôlé hyperstable. Les marges de gain et de phase sont ainsi infinies. L'absorbeur hybride développé dans cette étude est comparé a d'autres approches plus classiques en termes d' atténuation, de consommation et de débattement .

Keywords

[PHYS.MECA.STRU] Physics [physics]/Mechanics [physics]/Structural mechanics [physics.class-ph]

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green