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Boundary control of linearized Saint-Venant equations oscillating modes

Authors: Litrico, X.; Fromion, Vincent;

Boundary control of linearized Saint-Venant equations oscillating modes

Abstract

Les équations de Saint-Venant décrivent la dynamique unidimensionnelle d`un canal à surface libre. L`article étudie les modes oscillants de l`équation de Saint-Venant linéarisée et leur contrôle. Nous montrons qu`il est possible de supprimer les modes oscillants sur tout le canal en utilisant un contrôleur frontière utilisant uniquement la mesure du niveau à l`aval du bief. Ce contrôleur est de dimension infinie et n`est pas strictement propre, ce qui rend difficile sa mise en oeuvre sur un canal réel. Cependant, un contrôle statique peut être réalisé à l`aide d`un ouvrage hydraulique correctement conçu. Nous étudions l`effet d`un contrôleur proportionnel sur les modes oscillants et montrons qu`ils peuvent être atténués de façon asymptotique en utilisant un contrôleur ne dépendant que des caractéristiques locales de l`écoulement. Des résultats expérimentaux sur un canal montrent la performance du contrôle proposé.

The Saint-Venant equations describe the dynamics of one dimensional open-channel flow. The paper investigates linearized Saint-Venant equations modes and their control. We show that it is possible to suppress the oscillating modes over all the canal pool by a well-designed boundary dynamic controller using only the water level measurement at the downstream end of the pool. This controller is infinite dimensional, and also not strictly proper, which makes it difficult to implement on a real canal. However, a static control of the oscillating modes can be performed with a well-designed hydraulic structure. We therefore study the specific case of a constant proportional controller on the oscillating modes and show that they can be asymptotically attenuated by using a controller that depends only on local flow characteristics. Experimental results on a real canal pool show the effectiveness of the proposed control.

Country
France
Keywords

[SDE] Environmental Sciences, RIEMANN INVARIANTS, FREQUENCY RESPONSE, WATER MANAGEMENT, SAINT-VENANT MODEL, IMPEDANCE MATCHING, 510, [INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering, water management, Nonlinear systems in control theory, ROOT LOCUS, Water waves, gravity waves; dispersion and scattering, nonlinear interaction, impedance matching, Control/observation systems governed by partial differential equations, saint-venant model, OPEN-CHANNEL SYSTEM, Linearizations, frequency response, open-channel system, root locus, [INFO.INFO-AU] Computer Science [cs]/Automatic Control Engineering, Riemann invariants

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selected citations
These citations are derived from selected sources.
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!
41
Top 10%
Top 10%
Top 10%
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