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Optimal Controller for Turbulent Flow Over an Airfoil

John Kim

出版	Air Force Office of Scientific Research, 2006
URL	http://books.google.com.hk/books?id=FMtJB67uNgQC&hl=&source=gbs_api

註釋

The objectives of this project are twofold: to develop a detached-eddy simulation (DES) technique for turbulent flows past an airfoil at a high angle of attack, and to explore new control strategies for the separated flow, utilizing modern control theories. A system identification approach is used to construct an approximate linear system model for complex flows. The linear quadratic Gaussian (LQG) control synthesis is then used to design optimal controllers for the identified linear model. A system-identification-LQG approach is applied to control a separated boundary layer flow on a flat plate. The controller design based on the identified linear model is shown to reduce the time-averaged separation bubble size.