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Proceedings Paper

Distributed and discrete transducer spatial design for finite-element-modeled flexible structures
Author(s): John E. Meyer; Shawn Edward Burke; James E. Hubbard
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Paper Abstract

A modeling technique is presented for transducer spatial design applicable to discrete and distributed transducers with arbitrary one-dimensional shading (spatial gain weighting). The technique accommodates finite element models (FEM) composed of beamlike elements yielding modal displacements and rotations at element node locations. An example is presented: transducer spatial design for a 56-in. by 59-in. nine-bay aluminum grillage. Locations and distributions were chosen in order to shape the system's transducer-augmented forward loop transfer function, making the modal coefficients as large as possible within the eight-mode control bandwidth, and minimizing the coefficients associated with higher frequency modes of vibration. The transducer suite includes accelerometers and the piezoelectric polymer polyvinylidene-fluoride (PVDF) for sensors with lead- zircon-titanate piezoelectric ceramic and PVDF actuators. Modal coefficients employing the three aforementioned techniques are presented showing an average deviation in coefficient magnitude between different methods of calculation of 1.16% over the first 24 modes of vibration.

Paper Details

Date Published: 6 May 1994
PDF: 12 pages
Proc. SPIE 2190, Smart Structures and Materials 1994: Smart Structures and Intelligent Systems, (6 May 1994); doi: 10.1117/12.175197
Show Author Affiliations
John E. Meyer, Charles Stark Draper Lab., Inc. (United States)
Shawn Edward Burke, Charles Stark Draper Lab., Inc. (United States)
James E. Hubbard, Optron Systems, Inc. (United States)

Published in SPIE Proceedings Vol. 2190:
Smart Structures and Materials 1994: Smart Structures and Intelligent Systems
Nesbitt W. Hagood, Editor(s)

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