Internal control of systems of semilinear coupled 1-D wave equations

Christophe Zhang (1, 2)

1 LJLL - Laboratoire Jacques-Louis Lions
2 ETH-Forschungsintitut für Mathematik

We prove the internal controllability of some systems of two coupled wave equations in one space dimension, with one control, under certain conditions on the coupling. To do this we apply the " fictitious control method " in two cases: general systems with a " non-degenerate " coupling, and a particular case where the coupling is " degenerate " , namely a cubic coupling. In the latter case, our proof requires to find nontrivial trajectories of the control system that go from 0 to 0. We build these trajectories by adapting (in 1 space dimension) a construction developed by Jean-Michel Coron, Sergio Guerrero and Lionel Rosier for the study of coupled parabolic systems.

Mots clés: return method; algebraic solvability; fictitious control method; Wave equations; coupled systems; exact internal controllability

Domaines: Mathématiques [math]; Optimisation et contrôle [math.OC]; Equations aux dérivées partielles [math.AP]

Christophe Zhang. Internal control of systems of semilinear coupled 1-D wave equations. 2017. ⟨hal-01517461v1⟩