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Research Article

Simulation of time-domain bottom reverberation signalusing energy-flux model

에너지 플럭스 모델을 활용한 해저 잔향음 신호 모의

Young-Cheol Jung1
,
Keun-Hwa Lee2
,
Woojae Seong1∗
,
Seongil Kim3
정 영철1
,
이 근화2
,
성 우제1∗
,
김 성일3
1서울대학교 조선해양공학과
2세종대학교 국방시스템공학과
3국방과학연구소 제 6기술연구본부
∗Corresponding Author
31 January 2019. pp. 96-105
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Abstract

Ocean reverberation is the most limiting factor in designing realistic and real-time system for sonar simulator. The simulation for an ocean reverberation requires a lot of computational loads, so it is hard to embed program and generate real-time signal in the sonar simulator. In this study, we simulate a time-domain bottom reverberation signal based on Harrison’s energy-flux bottom reverberation model by applying Doppler effects as ship maneuvering and autoregressive model. Finally, the bottom reverberation signal with realistic characteristics could be generated for the simulation of ONR reverberation modeling workshop-I problem XI and East Sea ocean environments.

Keywords
Active sonar
Ocean reverberation
Bottom reverberation
Reverberation time series

능동소나 시뮬레이터에서 실제와 유사하고 실시간 운용 가능토록 설계하는데 가장 제한적인 요소는 잔향음이다. 잔향음 모의는 계산시간이 많이 소요되어 시뮬레이터에 반영하고 실시간으로 신호를 생성하는데 한계가 있었다. 본 연구에서는 Harrison의 에너지 플럭스 해저 잔향음 모델을 기반으로 함정 기동에 따른 도플러 효과와 자기회귀 모델을 적용하여 해저 잔향음 시계열 신호를 모의하였다. 최종적으로 해군연구국 잔향음 워크숍-I 11번 문제와 동해 해양환경을 토대로 모의 한 결과, 실제와 유사한 특징의 해저 잔향음 신호를 생성할 수 있었다.

키워드
능동소나
해양 잔향음
해저 잔향음
시계열 신호
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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 : 38
  • No :1
  • Pages :96-105
  • Received Date : 2018-10-22
  • Accepted Date : 2019-01-23
  • DOI :https://doi.org/10.7776/ASK.2019.38.1.096
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