Frequency-Agile High-Power-Density Transducers: Draft/Final Technical Report

This report documents a design study aimed at producing broader bandwidth, high- power transducers for Navy applications in littoral waters. The top-to-bottom study included both ceramic driver processing and the transducer design itself. Active Signal Technologies and Alfred University investigated...

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Bibliographic Details
Main Authors: Bridger, Keith, Sewell, John M, Kuhn, Philip M, Passaro, Edward J, Cho, Yong S
Format: Report
Language:English
Subjects:
ALUMINUM
BROADBAND TRANSDUCERS
CERAMIC COATINGS
CYLINDRICAL BODIES
DIELECTRICS
Electrical and Electronic Equipment
FLEXURAL PROPERTIES
HIGH DENSITY
HIGH POWER
LEAD(METAL)
LITTORAL ZONES
MAGNESIUM ALLOYS
Mechanics
PARAMETRIC ANALYSIS
PARTICLES
POWER EQUIPMENT
RADIATION
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Summary:This report documents a design study aimed at producing broader bandwidth, high- power transducers for Navy applications in littoral waters. The top-to-bottom study included both ceramic driver processing and the transducer design itself. Active Signal Technologies and Alfred University investigated a novel processing method involving coating the ceramic particles prior to densification and it substantially increased the room-temperature electrically-induced strains available from the ceramic without significantly increasing dielectric loss. This strain increase could translate to a >3-dB increase in power density for the broadband transducers. Active Signal investigated a range of transducer classes including Class IV and VII Flextensional, Tonpilz, Moment Bender, Flexural Disk, and Split Cylinder. Substituting graphite-epoxy for aluminum in the radiating surface produced ^ 30% increases in bandwidth in most of the classes. With this and other parametric adjustments, designs that met feasibility criteria (power, efficiency, depth dependence, etc.) but had fractional bandwidths > 80% were prepared. The recommended design was a graphite-epoxy Class-TV Flextensional. Prepared in cooperation with Alfred Univ., N.Y.