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Stabilisation of a linearised Cahn-Hilliard system for phase separation by proportional boundary feedbacks. (English) Zbl 1461.93400

Summary: This work represents a first contribution on the problem of boundary stabilisation for the phase field system of Cahn-Hilliard type, which models the phase separation in a binary mixture. The feedback controller we design here is with actuation only on the temperature flow of the system, on one part of the boundary only. Moreover, it is of proportional type, given in an explicit form, expressed only in terms of the eigenfunctions of the Laplace operator, being easy to manipulate from the computational point of view. Furthermore, it ensures that the closed loop nonlinear system exponentially reaches the prescribed stationary solution provided that the initial datum is close enough to it.

MSC:

93D15 Stabilization of systems by feedback
93C20 Control/observation systems governed by partial differential equations
35K52 Initial-boundary value problems for higher-order parabolic systems
35Q79 PDEs in connection with classical thermodynamics and heat transfer
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References:

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