Paper
23 May 1997 Piezoelectric actuators for fluid-flow control
Louis N. Cattafesta III, Sanjay Garg, Anthony E. Washburn
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Abstract
The characteristics of cantilever piezoelectric actuators are investigated both theoretically and experimentally. The type of actuators considered consist of a single sheet of piezoceramic material bounded to a shim--termed a `unimorph' design. A theoretical model, based on beam theory, is developed to predict the static and dynamic behavior of the actuator. The model predictions compare favorably to measurements of the actuator transfer function. A sample application to noise reduction of flow-induced cavity oscillations at low subsonic speeds is described. Use of the actuators in an open-loop control system resulted in 18 and 25 dB attenuation in the broadband and primary tone sound pressure levels, respectively.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Louis N. Cattafesta III, Sanjay Garg, and Anthony E. Washburn "Piezoelectric actuators for fluid-flow control", Proc. SPIE 3044, Smart Structures and Materials 1997: Industrial and Commercial Applications of Smart Structures Technologies, (23 May 1997); https://doi.org/10.1117/12.274658
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CITATIONS
Cited by 15 scholarly publications.
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KEYWORDS
Actuators

Control systems

Sensors

Denoising

Acoustics

Amplitude modulation

Composites

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