Acoustic Modeling and Control of Conical Enclosures

[+] Author and Article Information
Kevin M. Farinholt, Donald J. Leo

Center for Intelligent Material Systems and Structures, Mechanical Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061

J. Vib. Acoust 125(1), 2-11 (Jan 06, 2003) (10 pages) doi:10.1115/1.1521953 History: Received February 01, 2002; Revised June 01, 2002; Online January 06, 2003
Copyright © 2003 by ASME
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Glaese,  R. M., and Anderson,  E. H., 1999, “Active Structural-Acoustic Control for Composite Payload Fairings,” SPIE Proceedings,3668(43), pp. 450–461.
Leo, D. J., and Anderson, E. H., 1998, “Vibroacoustic Modeling of a Launch Vehicle Payload Fairing for Active Acoustic Control,” Proceedings of the 39th Structures, Structural Dynamics, and Materials Conference, pp. 3212–3222.
Griffin,  S., Lane,  S. A., Hansen,  C., and Cazzolato,  B., 2001, “Active Structural-Acoustic Control of a Rocket Fairing Using Proof-Mass Actuators,” J. Spacecr. Rockets, 38(2), pp. 219–225.
Lane,  S. A., Kemp,  J. D., Griffin,  S., and Clark,  R. L., 2001, “Acoustic Control of a Rocket Fairing Using Spatially Weighted Transducer Arrays,” J. Spacecr. Rockets, 38(1), pp. 112–119.
Olson, H. F., 1967, Music, Physics and Engineering, Second Edition, New York, NY, Dover Publications.
Rigden, J. S., 1977, Physics and the Sound of Music, New York, NY, John Wiley & Sons.
Taylor, C., 1992, Exploring Music, The Science and Technology of Tones and Tunes, Bristol, TN, IOP Publishing INC.
Ayers,  R. D., Eliason,  L. J., and Mahgerefteh,  D., 1985, “The Conical Bore in Musical Acoustics,” Am. J. Phys., 53(6), June, pp. 529–537.
Kinsler, L., Frey, A., Coppens, A., and Sanders, J., 1997, Fundamentals of Acoustics, New York, NY, John Wiley and Sons, 3rd ed.
Bies, D. A., and Hansen, C. H., 1996, Engineering Noise Control Theory and Principle, New York, NY, E & FN Spon, 2nd ed.
Leo,  D. J., Austin,  E. M., and Beattie,  C., 2001, “Constrained Substructure Approach to Optimal Strain Energy Analysis,” ASME J. Vibr. Acoust., 123(3), pp. 340–346.
Fanson,  J., and Caughey,  T., 1990, “Positive Position Feedback Control for Large Space Structures,” AIAA J., 28(4), pp. 717–724.
McEver,  M. A., and Leo,  D. J., 2001, “Autonomous Vibration Suppression Using Online Pole-Zero Identification,” ASME J. Vibr. Acoust., 123(4), pp. 487–495.
McEver, M. A., 1999, “Optimal Vibration Suppression Using On-line Pole/Zero Identification,” Masters Thesis, Virginia Polytechnic Institute & State University.
DeGuilio, A. P., 2000, “A Comprehensive Experimental Evaluation of Actively Controlled Piezoceramics with Positive Position Feedback for Structural Damping,” Masters Thesis, Virginia Polytechnic Institute & State University, April.


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Various shroud geometries: (a) grid stiffened USAF launch vehicle payload fairing (b) Titan IV payload fairing by Lockheed Martin
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Schematic of a conical bore having reactive-rigid boundary conditions
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Pole/zero shifts as a function of length to r1 ratio. ○→system zeros, ×→system poles, lightlines indicate zeros of equivalent cylinder, heavylines indicate poles of equivalent cylinder.
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Acoustic impedance of cone (solid) and cylinder (dashed) for various l/r1 ratios (a) Nearly identical impedances for conic and cylindrical sections, l/r1=0.001 (b) Impedance representative of experimental teststand, l/r1=2.84 and (c) Impedance with near pole-zero cancellation, l/r1=100.
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Actuator components, electrical model (a), mechanical model (b)
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Open-loop (lightly weighted) versus closed-loop (heavily weighted) performance of a conical shroud for a collocated sensor (a) and a noncollocated sensor (b). This frequency response relates output pressure to disturbance signal.
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Standing waves for an actuator-rigid set of boundary conditions with pressure slopes indicated
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Experimental setup for conical bore validation and control
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Open-loop comparison of experimentally obtained frequency response with that predicted by the impedance based model
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Impulse response with and without PPF control




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