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TECHNICAL PAPERS

Active Control of Low Frequency Modes in an Aircraft Fuselage Using Spatially Weighted Arrays

[+] Author and Article Information
Steven A. Lane

Jackson and Tull Engineering, 1900 Randolph Road, SE, Suite H, Albuquerque, NM 87106

Robert L. Clark

Department of Mechanical Engineering and Material Sciences, Duke University, Durham, NC 27708

Steve C. Southward

Lord Corporation, 110 Lord Drive, Cary, NC 27511

J. Vib. Acoust 122(3), 227-234 (Mar 01, 2000) (8 pages) doi:10.1115/1.1303848 History: Received August 01, 1999; Revised March 01, 2000
Copyright © 2000 by ASME
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References

Olson,  H. F., and May,  E. G., 1953, “Electronic Sound Absorber,” J. Acoust. Soc. Am., 25, No. 6, pp. 1130–1136.
Lane,  S. A., and Clark,  R. L., 1998, “Dissipative Feedback Control of a Reverberant Enclosure Using a Constant Volume Velocity Source,” J. Vibr. Acoust., 120, pp. 987–993.
Morgan,  D. R., 1991, “An Adaptive Modal-Based Active Control System,” J. Acoust. Soc. Am., 89, No. 1, pp. 248–256.
Shelly, S. J., Allemang, R. J., et al., 1993, “Active Vibration Control Utilizing an Adaptive Modal Filter Based Modal Control Method,” Proceedings of the 11th International Modal Analysis Conference, pp. 751–758.
Meirovitch, L., 1990, Dynamics and Control of Structures, Wiley, New York, NY.
Burke, S. E., and Hubbard, J. E., 1990, “Distributed Transducers, Collocation, and Smart Structural Control,” SPIE 1990 Technical Symposium on Optical Engineering and Photonics in Aerospace Sensing, Orlando, FL.
Burke,  S. E., Hubbard,  J. E., and Meyer,  J. E., 1993, “Distributed Transducers and Colocation,” Mech. Syst. Signal Proc., 7, No. 4, pp. 349–361.
Burke,  S. E., and Meyer,  J. E., 1995, “Spatial Compensator Design for Active Vibration Damping with Links to Temporal Compensator Design,” SPIE, 2443, pp. 565–578.
Sullivan,  J. M., Hubbard,  J. E., and Burke,  S. E., 1996, “Modeling Approach for Two-Dimensional Transducers of Arbitrary Spatial Distribution,” J. Acoust. Soc. Am., 99, No. 5, pp. 2965–2974.
Clark,  R. L., and Cole,  D. G., 1995, “Active Damping of Enclosed Sound Fields Through Direct Rate Feedback Control,” J. Acoust. Soc. Am., 97, No. 3, pp. 1710–1716.
Balas,  M. J., 1979, “Direct Velocity Feedback Control of Large Space Structures,” J. Guid. Control, 2, No. 3, pp. 252–253.
Lane,  S. A., and Clark,  R. L., 1998, “Improving Loudspeaker Performance for Active Noise Control Applications,” J. Audio Eng. Soc., 46, No. 6, pp. 508–519.
Clark,  R. L., and Gibbs,  G., 1999, “Analysis, Testing, and Control of a Reverberant Sound Field within the Fuselage of a Business Jet,” J. Acoust. Soc. Am., 105, No. 4, pp. 227–286.
Clark, R. L., Saunders, W. R., and Gibbs, G. P., 1998, Adaptive Structures, Dynamics and Control, Wiley, New York, NY.
Lane, S. A., 1999, Active Noise Control in Acoustic Enclosures Using a Constant Volume Velocity Source, Ph.D. dissertation, Duke University, Durham, NC.
Juang, J., 1994, Applied System Identification, Prentice Hall, Englewood Cliffs, NJ.
Skogestad, S., and Postlewaite, I., 1996, Multivariable Feedback Control, Wiley, New York, NY.
Franklin, G. E., Powell, J. D., and Workman, M. L., 1992, Digital Control of Dynamic Systems, 2nd edition, Addison-Wesley, Reading, MA.
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Figures

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(a) Simply-supported rigid-wall cylinder with sensors, b) fundamental acoustic mode-shape and indication of sensor weighting values
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Schematic of the system with spatially weighted transducer arrays
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Block diagram of the augmented plant used in H2 synthesis
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Example of the sensor noise weighting filter used in H2 synthesis
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Schematic diagram of a sensor and actuator device
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Velocity response of a compensated actuator used in the fuselage experiments
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Schematic diagram of the experimental setup
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Frequency response from the disturbance to a sensor microphone
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Representative frequency response between an actuator and sensor pair
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Response (z⁁(s)/u⁁(s)) of the open-loop model for the first mode controller
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Response (y⁁(s)/u⁁(s)) of the open-loop model for the first mode controller
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Closed-loop results using the five-mode controller (performance microphones)
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Closed-loop results using the five-mode controller (sensor microphones)
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Comparison of the open-loop model and the loop-gain for the five-mode controller
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Closed-loop response measured using the first mode controller (performance microphones)
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Closed-loop response measured using the first mode controller (sensor microphones)
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Frequency response of the discrete control law for the first mode controller
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Single-input, two-output plant used for control law design
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Block diagram of the open-loop system with spatial weighting vectors
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Loop-gain of the system for the first mode controller
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Illustration of sensor/actuator placement inside of the fuselage

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