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Insensitizing controls for a class of nonlinear Ginzburg-Landau equations. (English) Zbl 1307.93074

Summary: This paper shows the existence of insensitizing controls for a class of nonlinear complex Ginzburg-Landau equations with homogeneous Dirichlet boundary conditions and arbitrarily located internal controller. When the nonlinearity in the equation satisfies a suitable superlinear growth condition at infinity, the existence of insensitizing controls for the corresponding semilinear Ginzburg-Landau equation is proved. Meanwhile, if the nonlinearity in the equation is only a smooth function without any additional growth condition, a local result on insensitizing controls is obtained. As usual, the problem of insensitizing controls is transformed into a suitable controllability problem for a coupled system governed by a semilinear complex Ginzburg-Landau equation and a linear one through one control. The key is to establish an observability inequality for a coupled linear Ginzburg-Landau system with one observer.

MSC:

93B05 Controllability
93B07 Observability
93C20 Control/observation systems governed by partial differential equations
93C10 Nonlinear systems in control theory
35Q56 Ginzburg-Landau equations
Full Text: DOI

References:

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