Universidad Complutense de Madrid
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Controllability of star-shaped networks of strings



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Zuazua Iriondo, Enrique y Dáger Salomón, René (2001) Controllability of star-shaped networks of strings. Comptes Rendus de l'Académie des Sciences. Série I. Mathématique , 332 (7). pp. 621-626. ISSN 0764-4442

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URL Oficial: http://www.sciencedirect.com/science/journal/07644442


In this note we consider a star-shaped network of vibrating strings. The problem of controllability when one control acts on the junction point is considered. A simple proof is given that, in particular, does not use Ingham inequalities, of the fact that the set of reachable data is dense, whenever the lengths of the strings are mutually irrational. The proof is based on an observability inequality with suitable weights on the Fourier coefficients that is easily obtained as a consequence of the time-periodicity of the solutions. Those weights can be estimated under certain algebraicity conditions imposed on the lengths of the strings. This allows to proof exact controllability results in Sobolev spaces of appropriate order. Further results are also presented concerning the control from a free end and diffusion processes.

Tipo de documento:Artículo
Palabras clave:Control acts on the junction point; Observability inequality
Materias:Ciencias > Matemáticas > Análisis numérico
Código ID:12176
Depositado:07 Feb 2011 09:04
Última Modificación:08 May 2013 17:15

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