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Piezoceramic Actuator Placement for Acoustic Control of PanelsOptimum placement of multiple traditional piezoceramic actuators is determined for active structural acoustic control of flat panels. The structural acoustic response is determined using acoustic radiation filters and structural surface vibration characteristics. Linear Quadratic Regulator (LQR) control is utilized to determine the optimum state feedback gain for active structural acoustic control. The optimum actuator location is determined by minimizing the structural acoustic radiated noise using a modified genetic algorithm. Experimental tests are conducted and compared to analytical results. Anisotropic piezoceramic actuators exhibit enhanced performance when compared to traditional isotropic piezoceramic actuators. As a result of the inherent isotropy, these advanced actuators develop strain along the principal material axis. The orientation of anisotropic actuators is investigated on the effect of structural vibration and acoustic control of curved and flat panels. A fully coupled shallow shell finite element formulation is developed to include anisotropic piezoceramic actuators for shell structures.
Document ID
20010001552
Acquisition Source
Langley Research Center
Document Type
Other
Authors
Bevan, Jeffrey S. (Old Dominion Univ. Norfolk, VA United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2000
Subject Category
Acoustics
Funding Number(s)
CONTRACT_GRANT: NAG1-2141
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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