Future launchvehicle payload fairings will be manufactured from advanced lightweight composite materials. The loss of distributed mass causes a significant increase in the internal acoustic environment, causing a severe threat to the payload. Using piezoelectric (PZT) actuators to control the fairing vibration and the internal acoustic environment has been proposed. To help determine the acoustic control authority of piezoelectric actuators mounted on a rocket fairing, the internal acoustic response created by the actuators needs to be determined. In this work the internal acoustic response of a closed simply-supported (SS) cylinder actuated by PZT actuators is determined using an impedance model for the actuator and boundary element analysis. The experimentally validated model is used to extrapolate results for a SS cylinder that emulates a Minotaur payload fairing. The internal cylinder acoustic levels are investigated for PZT actuation between 35 and 400 Hz. Significant reductions in the structural response due to increased damping do not equate to similar reductions in the acoustic sound pressure levels (SPLs) for the cylinder. The sound levels at the acoustic resonant frequencies are essentially unaffected by the significant increase in structural damping while the acoustic levels at the structural resonant frequencies are mildly reduced. The interior acoustic response of the cylinder is dominated by the acoustic modes and therefore significant reductions in the overall interior acoustic levels will not be achieved if only the structural resonances are controlled. As the actuation frequency is reduced, the number of actuators required to generate acoustic levels commensurate to that found in the fairing increases to impractical values. Below approximately 100 Hz, the current demands reach levels that are extremely difficult to achieve with a practical system. The results of this work imply that PZT actuators do not have the authority to control the payload fairing internal acoustics below 100 Hz.
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References
1.
Banks, H.T. , Lester, H.C. and Smith, R.C. (1992). A piezoelectric actuator model for active vibration and noise control in thin cylindrical shells. In: Proceedings of the 31st Conference on Decision and Control. Tucson, Arizona. December, pp. 1797–1802.
2.
Bullmore, A.J. , Nelson, P.A. and Elliot, S.J. (1986). Active minimisation of acoustic potential energy in harmonically excited cylindrical enclosed sound fields. AIAA 10th Aeroacoustics Conference. AIAA-86–1958, Seattle, WA. pp. 1–10, July 9–11.
3.
Clark, R.L. and Fuller, C.R. (1991). Experiments on active control of structurally radiated sound using multiple piezoceramic actuators. Journal of the Acoustical Society of America, 91(6): 3313–3320.
4.
Denoyer, K.K. , Griffin, S.F. and Sciulli, D. (1998). Hybrid structural/acoustic control of a sub-scale payload fairing. In: SPIE – Proceedings of the International Society for Optical Engineering. Vol. 3329. March 2–5, pp. 237–243.
5.
Fahy, F. (1985). Sound and Structural Vibration: Radiation, Transmission and Response. New York, NY: Academic Press.
6.
Falangas, E.T. , Dworak, J.A. and Koshigoe, S. (1994). Controlling plate vibrations using piezoelectric actuators. IEEE Control Systems. August, pp. 34–41.
7.
Falangas, E.T. , Dworak, J.A. and Koshigoe, S. (1993). Methods for controlling plate vibrations using piezoelectric actuators. AIAA-93–3723-CP: 214–223.
8.
Glaese, R.M. and Anderson, E.H. (1999). Active structural-acoustic control for composite payload fairings. SPIE Conference on Smart Structures and Materials. Newport Beach, CA.March 1–4.
9.
Griffin, S. , Hansen, C. and Cazzolato, B. (1999a). Feedback control of structurally radiated sound into enclosed spaces using structural sensing. Journal of the Acoustical Society of America, 106(5): 2621–2628.
10.
Griffin, S. , Hansen, C. and Cazzolato, B. (1999b). Feasibility of feedback control of transmitted sound into a launchvehicle fairing using structural sensing and proof mass actuators. In: Proceedings of the 40th AIAA/ASME/ASCE/AHS/ASC Structures Structural Dynamics, and Materials Conference & AIAA/ASME/AHS Adaptive Systems Forum. St. Louis, MO, AIAA-99–1529. April 12–15.
11.
Houston, B. , Marcus, M. and Bucaro, J. (1997). Active blankets for the control of payload fairing interior acoustics. In: Proceedings of the 38th AIAA/ASME/ASCE/AHS/ASC Structures Structural Dynamics, and Materials Conference & AIAA/ASME/AHS Adaptive Systems Forum. AIAA 97–1256, Kissimmee, FL. pp. 1–12, April 7–10.
12.
Houston, B. , Marcus, M., Bucaro, J. and Williams, E. (1996). Active control of payload fairing interior noise using physics-based control laws. 2nd AIAA/CEAS Aeroacoustics Conference. AIAA 96–1723, State College, PA. pp. 1–11, May 6–8.
13.
Huybrechts, S. and Meink, T.E. (1997). Advanced grid stiffened structures for the next generation of launch vehicles. In: Proceedings of the 1997 IEEE Aerospace Conference. Vol. 1. pp. 263–269.
14.
Koshigoe, S. , Gillis, J.T. and Falangas, E.T. (August 1993). A new approach for active control of sound transmission throughan elastic plate backed by a rectangular cavity. Journal of the Acoustical Society of America, 94(2): 900–907.
15.
Koshigoe, S. , Teagle, A. and Gordon, A. (January 1995). A time domain study of active control of sound transmission due to acoustic pulse excitation. Journal of the Acoustical Society of America, 97(1): 313–323.
16.
Koshigoe, S. , Teagle, A. and Tsay, C. (1995). Analysis of active control withon-line system identification on sound transmission through an elastic plate. In: SPIE – Proceedings of the International Society for Optical Engineering, Vol. 2442. pp. 46–57.
17.
Lalande, F. (1995). Modeling of induced strain actuation of shell structures. Ph.D. Dissertation, Virginia Polytechnic Institute and State University, Blacksburg, VA.
18.
Lalande, F. , Chaudhry, Z. and Rogers, C.A. (May 1995) Comparison of different impedance-based models for out-of-phase actuation of actuators bonded on ring structures. Journal of Intelligent Material Systems and Structures, 6: 389–395.
19.
Lalande, F. , Chaudhry, Z. and Rogers, C.A. (November 1995b). Impedance based modeling of actuators bonded to shell structures. Journal of Intelligent Material Systems and Structures, 6: 389–395.
20.
Lalande, F. , Chaudhry, Z. and Rogers, C.A. (1994). Modeling considerations for in-phase actuation of actuators bonded to shell structures. In: Proceedings of the AIAA/ASME/ASCE/AHS/ASC 35th Structures, Structural Dynamics, and Materials Conference, Adaptive Structures Forum. Hilton Head, SC. pp. 429–437.
21.
Lee, Y.A. (1992). Acoustic fill factors for a 120-inchdiameter fairing. NASA Contract Report 189284.
22.
Lefebvre, S. (1991). Active control of interior noise using actuators in a large-scale composite fuselage. MS. Thesis, Virginia Polytechnic Institute and State University, Blacksburg, VA.
23.
Leo, D.J. (September 1999). A feasibility study of piezoelectric actuation for launch vehicle payload fairings. AFOSR Technical Report, Contract F49620-93-C-0063.
24.
Leo, D.J. and Anderson, E.H. (1998). Vibroacoustic modeling of a launchvehicle payload fairing for active acoustic control. In: Proceedings of the 39th AIAA/ASME/ASCE/AHS/ASC Structures Structural Dynamics, and Materials Conference & AIAA/ASME/AHS Adaptive Systems Forum. pp. 3212–3222.
25.
Lester, H.C. and Lefebvre, S. (1991). Piezoelectric actuator models for active sound and vibration control of cylinders. In: Proceedings, Recent Advances in Active Noise and Vibration Control. Blacksburg, VA, Technomic Publishing Company, Inc. pp. 3–26. April 15–17.
26.
Liang, C. , Sun, F.P. and Rogers, C.A. (1993). An impedance method for dynamic analysis of active material systems. In: Proceedings of the AIAA/ASME/ASCE/AHS/ASC 34th Structures, Structural Dynamics, and Materials Conference. La Jolla, CA. pp. 3587–3599.
27.
Newbury, K. , Glaese, R., Leo, D. and Anderson, E. (1998). Dynamic characterization of grid stiffened composite panels for active structural-acoustic control. In: Proceedings of the ASME Winter Annual Meeting. IMECE, Anaheim, CA.November 16–20.
28.
Niezrecki, C. (1999). Structural and internal acoustic response of cylinders with applications to rocket payload fairings. Ph.D. Dissertation, Virginia Polytechnic Institute and State University, Blacksburg, VA.
29.
Niezrecki, C. and Cudney, H.H. (2000). Internal acoustic response of a simply-supported cylinder with single mode structural vibration. Journal of Sound and Vibration, 229(1): 183–193.
30.
Niezrecki, C. and Cudney, H.H. (1999). Creating and verifying a research-grade simply supported cylinder with PZT actuation. Journal of Sound and Vibration, 228(5): 961–975.
31.
Niezrecki, C. and Cudney, H.H. (1996). Preliminary review of active control technology applied to the fairing acoustic problem. In: Proceedings of the 37th AIAA/ASME/ASCE/AHS/ASC Structures Structural Dynamics, and Materials Conference & AIAA/ASME/AHS Adaptive Systems Forum. Salt Lake City, Utah. pp. 101–108. April 18–19.
32.
Robinson, M.J. , Charette, R.O. and Leonard, B.G. (January 1991). Advanced composite structures for launchvehicles. SAMPE Quarterly, 22(2): 26–37.
33.
Rossi, A. , Liang, C. and Rogers, C.A. (1993). Impedance modeling of piezoelectric actuator-driven systems: An application to cylindrical ring structures. In: Proceedings of the AIAA/ASME/ASCE/AHS/ASC 34th Structures, Structural Dynamics, and Materials Conference. La Jolla, CA. pp. 3618–3624.
34.
Shen, F. and Pope, D. (October 1990). Design and development of composite fairing structures for space launchvehicles. SAE Technical Paper 901836. Aerospace Technology Conference and Exposition. Long Beach, CA.
35.
Silcox, R.J. and Lester, H.C. (1989). Propeller modeling effects on interior noise in cylindrical cavities with application to active control. AIAA 12th Aeroacoustics Conference. AIAA-89–1123, San Antonio, TX. pp. 1–12. April 10–12.
36.
Snyder, S.D. and Hansen, C.H. (1994). The design of systems to control actively periodic sound transmission into enclosed spaces, part II: Mechanisms and trends. Journal of Sound and Vibration, 170(4): 451–472.
37.
Sonti, V.R. and Jones, J.D. (May 1996). Curved piezoelectric model for active vibration control of cylindrical shells. AIAA Journal, 34(5): 1034–1040.
38.
Sonti, V.R. and Jones, J.D. (1991). Active vibration control of thin cylindrical shells using piezoelectric actuators. In: Proceedings, Recent Advances in Active Noise and Vibration Control. Blacksburg, VA. Technomic Publishing Company, Inc., pp. 27–38. April 15–17.
39.
Zhou, S. , Liang, C. and Rogers, C.A. (1994). A dynamic model of a piezoelectric actuator-driven thin plate. In: Proceedings of the SPIE Conference on Smart Structures and Materials. Orlando, FL. Vol. 2190. pp. 550–562.
40.
Zhou, S. , Liang, C. and Rogers, C.A. (1993). Impedance modeling of two-dimensional piezoelectric actuators bonded on a cylinder. In: Proceedings of the ASME Winter Annual Meeting Adaptive Structures and Material Systems. New Orleans, LA. AD-Vol. 35. pp. 247–255.
