Linear compensator control of a pointsource induced perturbation in a Falkner–Skan–Cooke boundary layer

We focus on the problem of controlling pointsource induced perturbations on an infinite swept wing using linear control theory. Based on wall measurements in a spatial simulation of localized disturbances in Falkner–Skan–Cooke boundary layers, an extended Kalman filter is used to estimate the full t...

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Bibliographic Details
Published inPhysics of fluids (1994) Vol. 15; no. 8; pp. 2449 - 2452
Main Authors Högberg, Markus, Chevalier, Mattias, Henningson, Dan S.
Format Journal Article
LanguageEnglish
Published 01.08.2003
Subjects
flow
transition
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Summary:We focus on the problem of controlling pointsource induced perturbations on an infinite swept wing using linear control theory. Based on wall measurements in a spatial simulation of localized disturbances in Falkner–Skan–Cooke boundary layers, an extended Kalman filter is used to estimate the full three-dimensional wave packet. The estimated field is in turn used to calculate a feedback control which changes the growth of the disturbance into decay. This is the first time that optimal control and estimation concepts are successfully applied to construct a dynamic output feedback compensator which is used to control disturbances in spatially developing boundary layers.
ISSN:1070-6631
1089-7666
1089-7666
DOI:10.1063/1.1584434