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TECHNICAL PAPERS

Robust Control of a 2D Acoustic Enclosure*

[+] Author and Article Information
Hemanshu R. Pota, Ian R. Petersen

School of Electrical Engineering, UNSW at the Australian Defense Force Academy, Canberra ACT, 2600, Australia

Atul G. Kelkar

Department of Mechanical Engineering, Iowa State University, Ames, IA 50011e-mail: akelkar@isu.edu

J. Vib. Acoust 125(3), 374-383 (Jun 18, 2003) (10 pages) doi:10.1115/1.1570447 History: Received December 01, 2001; Revised February 01, 2002; Online June 18, 2003
Copyright © 2003 by ASME
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References

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Omoto,  A., and Elliott,  S. J., 1999, “The Effect of Structured Uncertainty in the Acoustic Plant on Multichannel Feedforward Control Systems,” IEEE Trans. Speech Audio Process., 7(2), pp. 204–212.
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Kelkar, A. G., and Pota, H. R., 2000, “Robust Broadband Control of Acoustic Duct,” Proceedings of the 39th IEEE Conference on Decision and Control, Sydney, Australia, pp. 4485–4490.
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Figures

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The experimental 2D enclosure
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Schematic of the experimental 2D enclosure
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Uncertain system representation
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Stochastic uncertain system
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The scaled H control problem
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Experimental and identified disturbance speaker response
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Experimental and identified control speaker response
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Uncertainty bound (dashed-20 log 10|W(jω)|,solid-20 log 10|P̃2(jω)−P2(jω)|/‖P1(jω)|)
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Experimental closed loop and open loop response
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Experimental and identified control speaker response
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Experimental and identified disturbance speaker response
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Uncertainty bound (dashed-20 log 10|W(jω)|,solid-20 log 10|P̃2(jω)−P2(jω)|/‖P1(jω)|)
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Experimental open loop and closed loop response
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Uncertainty bound (dashed-20 log 10|W(jω)|,solid-20 log 10|P̃2(jω)−P2(jω)|/‖P1(jω)|)
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Experimental closed loop and open loop response
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Nyquist plot of the loop-gain
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Two dimensional duct feedback controller setup
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Simulated closed loop and open loop response

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