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ESAIM: COCV, Vol. 2, pp. 343-357
DOI: 10.1051/cocv:1997112
Boundary controllability in problems of transmission for a class of second order hyperbolic systems
J.E. Lagneselagnese@gumath1.math.georgetown.edu
Abstract
We consider transmission problems for general second order linear hyperbolic
systems having piecewise constant coefficients in a bounded, open connected
set with smooth boundary and controlled through the Dirichlet boundary
condition. It is proved that such a system is exactly controllable in an
appropriate function space provided the interfaces where the coefficients
have a jump discontinuity are all star-shaped with respect to one and the
same point and the coefficients satisfy a certain monotonicity condition.
Résumé
On considère des problèmes de transmission pour des systèmes hyperboliques
généraux du deuxième ordre avec des coefficients constants par morceaux,
dans un ouvert borné connexe et régulier et avec contrôle de type Dirichlet.
On démontre qu'un tel système est exactement contrôlable dans un espace
fonctionnel approprié lorsque les interfaces où les coefficients ont des
sauts sont toutes étoilées par rapport à un point commun et les coefficients
vérifient une certaine condition de monotonie.
Key words: Second order linear hyperbolic systems / problems of transmission / exact controllability / reachability / boundary control.
© EDP Sciences, SMAI 1997
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