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Title: Obtaining Regional Dynamical Models for Flow Control using Wavelet Transform
Authors: Erbil, Türker Nazmi
Kasnakoğlu, Coşku
Keywords: flow control
regional dynamic modeling
wavelet transform
Issue Date: 2009
Publisher: IEEE
Source: 17th Mediterranean Conference on Control and Automation -- JUN 24-26, 2009 -- Thessaloniki, GREECE
Series/Report no.: Mediterranean Conference on Control and Automation
Abstract: In this paper, we utilize wavelet transform to obtain dynamical models describing the behavior of fluid flow in a local spatial region of interest. First, inapshots of the flow are obtained from experiments or from computational fluid dynamics (CFD) simulations of the governing equations. A wavelet family and decomposition level is selected by assessing the reconstruction success under the resulting inverse transform. The flow is then expanded onto a set of basis vectors which are constructed from the wavelet function. The wavelet coefficients associated with the basis vectors capture the time variation of the flow within the spatial region covered by the support of basis vectors. A dynamical model is established for these coefficients by using subspace identification methods. The approach developed is applied to a sample flow configuration on a square domain where the input affects the system through the boundary conditions. It is observed that there is good agreement between CFD simulation results and the predictions of the dynamical model. A controller is designed based on the dynamical model and is seen to be successful in regulating the velocity of a given point within the region of interest.
ISBN: 978-1-4244-4684-1
ISSN: 2325-369X
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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