NDLI: Piezoceramic actuator placement for acoustic control of panels

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Piezoceramic actuator placement for acoustic control of panels

Content Provider	NASA Technical Reports Server (NTRS)
Author	Bevan, Jeffrey S.
Copyright Year	2001
Description	Optimum 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 exhibits 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.
File Size	4186213
Page Count	106
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20020024458
Archival Resource Key	ark:/13960/t2t48nb2h
Language	English
Publisher Date	2001-12-01
Access Restriction	Open
Subject Keyword	Acoustics Panels Actuators Sound Waves Structural Vibration Piezoelectric Ceramics Genetic Algorithms Finite Element Method Noise Sound Anisotropy Vibration Effects Active Control Linear Quadratic Regulator Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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