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arXiv · 2302.13443

Boundary Effects on the Controllability of Coupled KdV Systems

F. A. Gallego·A. F. Pazoto·I. Rivas
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Abstract

We study the exact boundary controllability of a nonlinear coupled system of two Korteweg-de Vries equations on a bounded interval. The model describes the interactions of two weakly nonlinear gravity waves in a stratified fluid. Due to the nature of the system, six boundary conditions are required. However, to study the controllability property, we consider a different combination of the control inputs, with a maximum of four. Firstly, the results are obtained for the linearized system through a classical duality approach and some hidden regularity properties of the boundary terms. This approach reduces the controllability problem to the study of a spectral problem, which is solved by using the Paley-Wiener method introduced by Rosier. Then, the issue is to establish when a certain quotient of entire functions still turns out to be an entire function. It can be viewed as a problem of factoring an entire function that, depending on the control configuration, leads to the study of a transcendental equation. Finally, by using the contraction mapping theorem, we derive the local controllability for the full system.

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F. A. Gallego, A. F. Pazoto, I. Rivas. 2023-02-27. Boundary Effects on the Controllability of Coupled KdV Systems. https://arxiv.org/abs/2302.13443

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