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| HAL : inria-00288089, version 2 |
| Voir la fiche détaillée |  BibTeX,EndNote,... |
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| Versions disponibles | v1 (16-06-2008) | v2 (16-06-2008) |
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| Robust model identification of actuated vortex wakes |
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| Jessie Weller 1, 2Edoardo Lombardi 1, 2 |
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| (2008) |
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| We present a low-order modeling technique for actuated flows based on the regularization of an inverse problem. The inverse problem aims at minimizing the error between the model predictions and some reference simulations. The parameters to be identified are a subset of the coefficients of a polynomial expansion which models the temporal dynamics of a small number of global modes. These global modes are found by Proper Orthogonal Decomposition, which is a method to compute the most representative elements of an existing simulation database in terms of energy. It is shown that low-order control models based on a simple Galerkin projection and usual calibration techniques are not viable. They are either ill-posed or they give a poor approximation of the solution as soon as they are used to predict cases not belonging to the original solution database. In contrast, numerical evidence shows that the method we propose is robust with respect to variations of the control laws applied, thus allowing the actual use of such models for control. |
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| 1 : | Institut de Mathématiques de Bordeaux (IMB) |
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CNRS : UMR5251 – Université Sciences et Technologies - Bordeaux I – Université Victor Segalen - Bordeaux II |
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| 2 : | MC2 (INRIA Bordeaux - Sud-Ouest) |
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INRIA – Université Sciences et Technologies - Bordeaux I – Université Victor Segalen - Bordeaux II – CNRS : UMR |
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| Domaine | : | Physique/Mécanique/Mécanique des fluides Sciences de l'ingénieur/Mécanique/Mécanique des fluides |
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| reduced order models – control – inverse problems |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| inria-00288089, version 2 | |
| http://hal.inria.fr/inria-00288089 | |
| oai:hal.inria.fr:inria-00288089 | |
| Contributeur : Rapport De Recherche Inria | |
| Soumis le : Lundi 16 Juin 2008, 12:32:26 | |
| Dernière modification le : Lundi 16 Juin 2008, 13:24:16 | |
