Volume 25, 2019
|Number of page(s)||31|
|Published online||19 December 2019|
On boundary stability of inhomogeneous 2 × 2 1-D hyperbolic systems for the C1 norm
Sorbonne Université, Université Paris-Diderot SPC, CNRS, INRIA, Laboratoire Jacques-Louis Lions, LJLL, équipe CAGE,
* Corresponding author: firstname.lastname@example.org
Accepted: 31 October 2018
We study the exponential stability for the C1 norm of general 2 × 2 1-D quasilinear hyperbolic systems with source terms and boundary controls. When the propagation speeds of the system have the same sign, any nonuniform steady-state can be stabilized using boundary feedbacks that only depend on measurements at the boundaries and we give explicit conditions on the gain of the feedback. In other cases, we exhibit a simple numerical criterion for the existence of basic C1 Lyapunov function, a natural candidate for a Lyapunov function to ensure exponential stability for the C1 norm. We show that, under a simple condition on the source term, the existence of a basic C1 (or Cp, for any p ≥ 1) Lyapunov function is equivalent to the existence of a basic H2 (or Hq, for any q ≥ 2) Lyapunov function, its analogue for the H2 norm. Finally, we apply these results to the nonlinear Saint-Venant equations. We show in particular that in the subcritical regime, when the slope is larger than the friction, the system can always be stabilized in the C1 norm using static boundary feedbacks depending only on measurements at the boundaries, which has a large practical interest in hydraulic and engineering applications.
Mathematics Subject Classification: 35F30 / 93D15 / 93D20 / 93D30
Key words: Boundary feedback controls / hyperbolic systems / inhomogeneous systems / nonlinear partial differential equations / Lyapunov function / exponential stability
© EDP Sciences, SMAI 2019
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