Yuan, X.Caraballo, E.Yan, P.Özbay, HitaySerrani, A.DeBonis, J.Myatt, J. H.Samimy, M.2016-02-082016-02-082005-01http://hdl.handle.net/11693/27315Date of Conference: 10-13 January, 2005Conference name: 43rd AIAA Aerospace Sciences Meeting and ExhibitThis paper explores feedback controller design for cavity flows based on reduced-order models derived using Proper Orthogonal Decomposition (POD) along with Galerkin projection method. Our preliminary analysis shows that the equilibrium of the POD model is unstable and a static output feedback controller cannot stabilize it. We develop Linear Quadratic (LQ) optimal state feedback controllers and LQ optimal observers for the linearized models. The linear controllers and observers are applied to the nonlinear system using simulations. The controller robustness is numerically tested with respect to different POD models generated at different forcing frequencies. An estimation for the region of attraction of the linear controllers is also provided.EnglishFeedback controllersGalerkin projection methodLinear controllersProper orthogonal decomposition (POD)Control equipmentFeedback controlFrequenciesGalerkin methodsLinear control systemsState feedbackSubsonic flowConference Paper10.2514/6.2005-293