On the regional boundary observability of semilinear time-fractional systems with Caputo derivative
DOI:
https://doi.org/10.11121/ijocta.2023.1286Keywords:
Regional Boundary Observability, HUM Approach, Fixed Point, Semilinear Fractional Systems, Caputo Derivative, Control TheoryAbstract
This paper considers the regional boundary observability problem for semilinear time-fractional systems. The main objective is to reconstruct the initial state on a subregion of the boundary of the evolution domain of the considered fractional system using the output equation. We proceed by providing a link between the regional boundary observability of the considered semilinear system on the desired boundary subregion, and the regional observability of its linear part, in a well chosen subregion of the evolution domain. By adding some assumptions on the nonlinear term appearing in the considered system, we give the main theorem that allows us to reconstruct the initial state in the well-chosen subregion using the Hilbert uniqueness method (HUM). From it, we recover the initial state on the boundary subregion. Finally, we provide a numerical example that backs up the theoretical results presented in this paper with a satisfying reconstruction error.
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