Signal acquisition and processing for autonomous Space Shuttle Cargo Bay acoustic measurements (NASA G-313)
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Authors
Kuebler, David Paul
Subjects
Acoustics
Vibroacoustics
NASA G-313
Signal processing
Resonant modes
Vibroacoustics
NASA G-313
Signal processing
Resonant modes
Advisors
Garrett, Steven Lurie
Date of Issue
1988-06
Date
June 1988
Publisher
Language
en_US
Abstract
A narrowband trigonal acoustic transducer array and digital signal processing software are described in support of Space Shuttle Vibroacoustic experiment [NASA G-313]. The three co-planar, vibrationally isolated pressure-sensing microphones, the preamplifiers and the filters are designed to meet dynamic range and antiĀ aliasing requirements for the digitization and processing of recorded flight data with one Hertz resolution within the 30-780 Hz baseband acoustic spectrum. The experiment is designed to operate in environments up to 160 dB SPL and provides modal recognition and directional information to identify resonances and localize high intensity sound sources within the ambient launch environment of the Space Shuttle Cargo Bay. Also included is a model of the empty Cargo Bay resonances and modal density calculations based on an adiabatic
perturbation of a rigid, right circular cylindrical enclosure.
Type
Thesis
Description
Series/Report No
Department
Engineering Acoustic Academic Group
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
96 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.