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구형 알루미늄 쉘 내부의 충전유체에 따른 수중 음향 산란 특성 분석 및 유사 위그너-빌 분포를 이용한 식별 기법연구Analysis of acoustic scattering characteristics of an aluminum spherical shell with different internal fluids and classification using pseudo Wigner-Ville distributionㅂㅜ

Other Titles
Analysis of acoustic scattering characteristics of an aluminum spherical shell with different internal fluids and classification using pseudo Wigner-Ville distributionㅂㅜ
Authors
Choo, Y.-S.Byun, S.-H.Kim, S.-M.Lee, K.
Issue Date
9월-2019
Publisher
한국음향학회
Keywords
Acoustic scattering; Active sonar; Aluminum spherical shell; Pseudo Wigner-Ville distribution; Sonar target classification
Citation
한국음향학회지, v.38, no.5, pp 549 - 557
Pages
9
Journal Title
한국음향학회지
Volume
38
Number
5
Start Page
549
End Page
557
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/430
DOI
10.7776/ASK.2019.38.5.549
ISSN
1225-4428
2287-3775
Abstract
The acoustical scattering characteristics of a target are influenced by the material properties and structural characteristics of the target, which are critical information for acoustic detection and identification of underwater target. In particular, for thin elastic target, unique scattered signals are generated around the target by the Lamb wave. In this paper, the results of scattered signal measurement of aluminum spherical shell in the water tank using the stepped frequency sweep sine signal are presented. In particular, the scattering of the water-filled aluminum spherical shell is compared with that of the air-filled one both theoretically and experimentally. The difference of the scattered signals are analyzed using the pseudo Wigner-Ville distribution in terms of average frequency, frequency distribution, and energy of the scattered signal. The result shows that all observed parameters increased when the aluminum sphere was water-filled, and it is well matched to the theoretical expectation. ? 2019 Acoustical Society of Korea. All rights reserved.
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