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TECHNICAL PAPERS

Optimal Feedback Control of Vortex Shedding Using Proper Orthogonal Decomposition Models

[+] Author and Article Information
Sahjendra N. Singh

Department of Electrical and Computer Engineering, University of Nevada, Las Vegas, NV 89154-4026

James H. Myatt, Gregory A. Addington, Siva Banda, James K. Hall

Airforce Research Laboratory (AFRL/VACA), 2210 Eighth St., Bldg. 146, Wright-Patterson AFB, OH 45433-7531

J. Fluids Eng 123(3), 612-618 (May 01, 2001) (7 pages) doi:10.1115/1.1385513 History: Received October 28, 2000; Revised May 01, 2001
Copyright © 2001 by ASME
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References

Figures

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Simulation domain for flow past circular cylinder (diameter of cylinder=1; upstream and downstream boundaries from center of cylinder=10, 15; width=20)
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Open-loop response of Model I: (2a) Amplitude (mode 1); (2b) amplitude (mode 2); (2c) amplitude phase plot (mode 3, mode 4); (2d) norm of mode amplitudes
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Closed-loop control (Model I): (3a) Amplitude mode 1 to 3 (solid; [[dot_dash_line]]; [[dashed_line]]); (3b) amplitude mode 4 to 6 (solid; [[dot_dash_line]]; [[dashed_line]]); (3c) amplitude mode 7 to 9 (solid; [[dot_dash_line]]; [[dashed_line]]); (3d) amplitude mode 10 to 12 (solid; [[dot_dash_line]]; [[dashed_line]]); (3e) amplitude mode 13 to 15 (solid; [[dot_dash_line]]; [[dashed_line]]); (3f) amplitude mode 16 to 18 (solid; [[dot_dash_line]]; [[dashed_line]]); (3g) norm of mode amplitudes; (3h) angular velocity and control input (solid; [[dashed_line]])
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Open-loop response of Model II: (4a) Amplitude (mode 1); (4b) amplitude (mode 2); (4c) amplitude phase plot (mode 5, mode 6); (4d) norm of mode amplitudes
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Closed-loop control (Model II): (5a) Amplitude mode 1 to 3 (solid; [[dot_dash_line]]; [[dashed_line]]); (5b) amplitude mode 4 to 6 (solid; [[dot_dash_line]]; [[dashed_line]]); (5c) amplitude mode 7 to 9 (solid; [[dot_dash_line]]; [[dashed_line]]); (5d) amplitude mode 10 to 12 (solid; [[dot_dash_line]]; [[dashed_line]]); (5e) amplitude mode 13 to 15 (solid; [[dot_dash_line]]; [[dashed_line]]); (5f) amplitude mode 16 to 18 (solid; [[dot_dash_line]]; [[dashed_line]]); (5g) norm of mode amplitudes; (5h) angular velocity

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