Switched Dynamical Systems for Reduced-Order Flow Modeling

Autor:	Howard H. Hamilton, Andrew J. Kurdila, Anand K. Jammulamadaka
Rok vydání:	2008
Předmět:	Flow system Control theory Aerospace Engineering Flow modeling Linear subspace Subspace topology Mathematics Parametric statistics Reduced order
Zdroj:	AIAA Journal. 46:664-672
ISSN:	1533-385X 0001-1452
DOI:	10.2514/1.28896
Popis:	We develop a family of reduced-order models for the modeling and control of a flow system operating under varying fluid and actuation parameters. The parametric subspaces of the reduced-order models are formed by considering the angle between the reduced-order subspaces that span the velocity fields. This grouping is combined with a discrete switching law to form a switched dynamic system composed of a set of reduced-order models. This methodology is applied to the modeling of a lid-driven cavity under varying translation velocities and phase differentials between the upper and lower walls. It is shown that the subspace angle metric successfully partitions the parametric space and provides insight on the dominant parameters that characterize the flowfields. An open-loop simulation of the resulting switched dynamic system demonstrates its ability to capture the evolution of the flow and input parameters as it occurs in the full-order model.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::eb2d3e9333e4d5571a614571917287fd https://doi.org/10.2514/1.28896 Zobrazit plný text záznamu