Micro-computer Modeling and Simulation of Conformal Acoustic Array Performance Array Element Degradation Effects
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Authors
Fleurant, Sylvain J.
Subjects
Aperture function
Beam pattern
Conformal acoustic array
Directivity function
Hydrophone
Relative sensitivity
Software simulation
Beam pattern
Conformal acoustic array
Directivity function
Hydrophone
Relative sensitivity
Software simulation
Advisors
Wilson, O.B.
Hamming, Richard W.
Ziomek, Lawrence J.
Date of Issue
1985-12
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
A far-field beam pattern or directivity function of a conformal acoustic array can be generated by performing a three dimensional spatial discrete Fourier transform of the array’s aperture function. The beam pattern is a function of frequency, and both spherical angles of direction. It is strongly dependent on the aperture window, on the applied time delays, and the geometrical configuration of the array. A user-friendly micro-computer software program was created to study the actual array design and the degraded array. The program generates tabular and graphical data in a short period of time (3 min.) for a given frequency, bearing angle (MRA), speed of sound and configuration. Finally, this thesis shows that the degradation of even a few elements seriously influences the sensitivity and the shape of the beam pattern, and the users must draw conclusion on an individual basis.
Type
Thesis
Description
Series/Report No
Department
Engineering Acoustics Academic Committee
Department of Computer Science
Organization
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.