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Control of a separated boundary layer: Reduced-order modeling using global modes revisited

Abstract : The possibility of model reduction using global modes is readdressed, aiming at the controlling of a globally unstable separation bubble induced by a bump geometry. A combined oblique and orthogonal projection approach is proposed to design an estimator and controller in a Riccati-type feedback setting. An input-output criterion is used to appropriately select the modes of the projection basis. The full-state linear instability dynamics is shown to be successfully controlled by the feedback coupling with controllers of moderate degrees of freedom.
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https://hal.archives-ouvertes.fr/hal-00433158
Contributor : Uwe Ehrenstein <>
Submitted on : Wednesday, November 18, 2009 - 12:32:30 PM
Last modification on : Tuesday, October 13, 2020 - 3:10:19 AM
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Uwe Ehrenstein, Pierre-Yves Passaggia, Francois Gallaire. Control of a separated boundary layer: Reduced-order modeling using global modes revisited. Theoretical and Computational Fluid Dynamics, Springer Verlag, 2011, 25 (1), pp.195-207. ⟨10.1007/s00162-010-0195-5⟩. ⟨hal-00433158⟩

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