We present a global framework for the feedback control of a large class of spatially-developing boundary-layer flow systems. The systems considered are (approximately) parabolic in the spatial coordinate x. This facilitates the application of a range of established feedback control theories which are based on the solution of differential Riccati equations which march over a finite horizon in x (rather than marching in t, as customary). However, unlike systems which are parabolic in time, there is no causality constraint for the feedback control of systems which are parabolic in space; that is, downstream information may be used to update the controls upstream. Thus, a particular actuator may be used to neutralize the effects of a disturbance which actually enters the system downstream of the actuator location. In the present study, a numerically-tractable feedback control strategy is proposed which takes advantage of this special capability of feedback control rules in the spatially-parabolic setting in order to minimize a globally-defined cost function in an effort to maintain laminar boundary-layer flow.
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ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
July 14–18, 2002
Montreal, Quebec, Canada
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-3615-0
PROCEEDINGS PAPER
A Numerically Tractable Global Framework for the Feedback Control of Boundary-Layer Perturbations Available to Purchase
Patricia Cathalifaud,
Patricia Cathalifaud
University of California at San Diego, La Jolla, CA
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Thomas R. Bewley
Thomas R. Bewley
University of California at San Diego, La Jolla, CA
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Patricia Cathalifaud
University of California at San Diego, La Jolla, CA
Thomas R. Bewley
University of California at San Diego, La Jolla, CA
Paper No:
FEDSM2002-31062, pp. 1463-1468; 6 pages
Published Online:
February 24, 2009
Citation
Cathalifaud, P, & Bewley, TR. "A Numerically Tractable Global Framework for the Feedback Control of Boundary-Layer Perturbations." Proceedings of the ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. Volume 1: Fora, Parts A and B. Montreal, Quebec, Canada. July 14–18, 2002. pp. 1463-1468. ASME. https://doi.org/10.1115/FEDSM2002-31062
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