Exact Controllability and Stabilization of Locally Coupled Wave Equations: Theoretical Results

  • Stéphane Gerbi

    Université Savoie Mont Blanc, Le Bourget du Lac, France
  • Chiraz Kassem

    Université Libanaise, Beirut, Lebanon
  • Amina Mortada

    Université Libanaise, Beirut, Lebanon
  • Ali Wehbe

    Université Libanaise, Beirut, Lebanon
Exact Controllability and Stabilization of Locally Coupled Wave Equations: Theoretical Results cover
Download PDF

A subscription is required to access this article.

Abstract

In this paper, we study the exact controllability and stabilization of a system of two wave equations coupled by velocities with an internal, local control acting on only one equation. We distinguish two cases. In the first one, when the waves propagate at the same speed: using a frequency domain approach combined with multiplier technique, we prove that the system is exponentially stable when the coupling region is a subset of the damping region and satisfies the geometric control condition GCC (see Definition 3.1 below). Following a result of Haraux [10], we establish the main indirect observability inequality. This results leads, by the HUM method, to prove that the total system is exactly controllable by means of locally distributed control. In the second case, when the waves propagate at different speed, we establish an exponential decay rate in the weak energy space under appropriate geometric conditions. Consequently, the system is exactly controllable using a result of [10].

Cite this article

Stéphane Gerbi, Chiraz Kassem, Amina Mortada, Ali Wehbe, Exact Controllability and Stabilization of Locally Coupled Wave Equations: Theoretical Results. Z. Anal. Anwend. 40 (2021), no. 1, pp. 67–96

DOI 10.4171/ZAA/1673