Volume 15, Number 4, October-December 2009
|Page(s)||934 - 968|
|Published online||21 October 2008|
Feedback stabilization of the 2-D and 3-D Navier-Stokes equations based on an extended system
Laboratoire LMA, UMR CNRS 5142, Université de Pau et des Pays de l'Adour, 64013 Pau Cedex, France.
Revised: 11 July 2007
Revised: 8 April 2008
We study the local exponential stabilization of the 2D and 3D Navier-Stokes equations in a bounded domain, around a given steady-state flow, by means of a boundary control. We look for a control so that the solution to the Navier-Stokes equations be a strong solution. In the 3D case, such solutions may exist if the Dirichlet control satisfies a compatibility condition with the initial condition. In order to determine a feedback law satisfying such a compatibility condition, we consider an extended system coupling the Navier-Stokes equations with an equation satisfied by the control on the boundary of the domain. We determine a linear feedback law by solving a linear quadratic control problem for the linearized extended system. We show that this feedback law also stabilizes the nonlinear extended system.
Mathematics Subject Classification: 35Q30 / 76D05 / 76D07 / 76D55 / 93B52 / 93C20 / 93D15
Key words: Navier-Stokes equation / feedback stabilization / Dirichlet control / Riccati equation
© EDP Sciences, SMAI, 2008
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