Input-output analysis, model reduction and control of the flat-plate boundary layer
2009 (English)In: Journal of Fluid Mechanics, ISSN 0022-1120, E-ISSN 1469-7645, Vol. 620, 263-298 p.Article in journal (Refereed) Published
The dynamics and control of two-dimensional disturbances in the spatially evolving boundary layer oil a flat plate are investigated from an input output viewpoint. A set-up of spatially localized inputs (external disturbances and actuators) and Outputs (objective functions and sensors) is introduced for the control design of convectively unstable flow configurations. From the linearized Navier Stokes equations with the inputs and outputs, controllable, observable and balanced modes are extracted using the snapshot method. A balanced reduced-order model (ROM) is constructed and shown to capture the input output behaviour of the linearized Navier Stokes equations. This model is finally used to design H-2-feedback controller to suppress the growth or two-dimensional perturbations inside the boundary layer.
Place, publisher, year, edition, pages
2009. Vol. 620, 263-298 p.
Control design, Dynamics and control, External disturbances, Feedback controller, Flat plate, Input output analysis, Input-output, Linearized navier-stokes equations, Model reduction, Objective functions, Reduced order models, Snapshot method, Two-dimensional perturbation, Unstable flows, Aerodynamics, Boundary layers, Fluid dynamics, Linearization, Two dimensional, Viscous flow
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-8500DOI: 10.1017/S0022112008004394ISI: 000263384700012ScopusID: 2-s2.0-65649154530OAI: oai:DiVA.org:kth-8500DiVA: diva2:13843
QC 20101103 Submitted 20082008-05-232008-05-232010-11-03Bibliographically approved