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2021 Vol.40, Issue 2

Research Article

Analysis of false alarm possibility using simulation of back-scattering signals from water masses

수괴 산란신호 모의를 통한 오탐 가능성 분석

Yonghoon Ha1*
하 용훈1*
1국방대학교 국방과학학과
*Corresponding Author
31 March 2021. pp. 99-108
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Abstract

In this paper numerical wave propagation experiments have been performed to visually confirm whether the signals scattered by water masses can be a false alarm in active sonar. The numerical environments consist of exaggerated water masses as targets in free space. Using a pseudospectral time-domain model for irregular boundary, the back-scattered signals have been calculated and compared with analytic solutions. Also, the sound propagation was simulated. Consequently, it was verified that water masses themselves could not be detected as a false target.

Keywords
Water masses
Scattering
False alarm
PseudoSpectral Time-Domain (PSTD) model

본 논문에서는 수괴가 능동소나에서 허위표적으로 오인 탐지 될 수 있는지에 대한 여부를 시각적으로 확인하기 위해 시간영역에 대한 음파 전달 수치 실험을 수행하였다. 수치 실험을 위해 무한영역에 과장된 수괴를 표적으로 구성하였으며 불연속 경계에 대해 개발된 시간영역 유사스펙트럴 모델을 이용하여 산란신호를 계산하고 해석해와 비교하였다. 또한, 시간에 따른 음파전달양상을 모의하였다. 이를 통해 수괴 자체가 허위표적으로 탐지 될 수 없음을 확인하였다.

키워드
수괴
산란
오탐(오경보)
시간영역 유사스펙트럴 모델
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Information
  • Publisher :The Acoustical Society of Korea
  • Publisher(Ko) :한국음향학회
  • Journal Title :The Journal of the Acoustical Society of Korea
  • Journal Title(Ko) :한국음향학회지
  • Volume : 40
  • No :2
  • Pages :99-108
  • Received Date : 2020-10-13
  • Revised Date : 2020-11-13
  • Accepted Date : 2021-03-22
  • DOI :https://doi.org/10.7776/ASK.2021.40.2.099
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