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저주파 수중 반향음 제어를 위한 타일형 프로젝터의 개발 및 성능시험
우상범(Sangbeom Woo),이재완(Jae-Wan Lee),엄원석(Won-Suk Ohm),김완구(Wan-Gu Kim),강휘석(Hwi-Suk Kang),윤석왕(Suk Wang Yoon),서영수(Youngsoo Seo) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.10
In this paper, a tile projector was developed for the control of low-frequency underwater echoes. The projector was designed to cover a wide area such as the hull of a submarine, and to have a relatively thin thickness. As a preliminary work for active echo control, the performance of the projector was measured in an anechoic water tank. The transmitting voltage response as well as the passive echo reduction were measured to evaluate the performance as an underwater projector.
타일형 프로젝터를 이용한 저주파 능동 반향음 감소 기법
이재완,우상범,장하다,이근상,김완구,강휘석,엄원석,박영철,윤석왕,서영수,Lee, Jae-Wan,Woo, Sangbeom,Jang, Hada,Lee, Keunsang,Kim, Wan-Gu,Kang, Hwi-Suk,Ohm, Won-Suk,Park, Youngcheol,Yoon, Suk Wang,Seo, Youngsoo 한국음향학회 2014 韓國音響學會誌 Vol.33 No.6
저주파 능동 소나를 이용한 잠수함 탐지 기술이 개발됨에 따라, 기존의 수동 무반향 타일을 대치할 새로운 잠수함 스텔스 기술이 요구되는 추세이다. 본 연구에서는 선체 표면과 같은 대면적에 적용 가능한 타일형 프로젝터를 이용하여 능동 임피던스 정합을 구현함으로써 저주파 반향음 감소를 도모하는 기법을 제안한다. 먼저 능동 임피던스 정합 기법의 기술적 타당성을 확인하기 위하여 유한요소 모델을 이용한 저주파 반향음 감소 시뮬레이션을 수행하였다. 이를 바탕으로 타일형 프로젝터를 설계 및 제작하여 음향수조에서 저주파 반향음 감소 실험을 수행하였다. With the advent of submarine detection technology using low-frequency active sonar there is a call for a new submarine stealth device that can replace the existing passive anechoic tiles. Proposed in this study is a low-frequency echo reduction technique based on active impedance matching, which employs a tile projector designed to cover a wide area such as the surface of a ship. To judge the feasibility of the active impedance matching technique finite-element simulations of low-frequency echo reduction are performed. Based on the analysis, a tile projector is designed, fabricated, and tested in an acoustic tank for its low-frequency echo reduction performance.
저주파 수중 반향음 제어를 위한 타일형 프로젝터의 유한요소 해석
이재완(Jae-Wan Lee),우상범(Sangbeom Woo),엄석원(Won-Suk Ohm),서영수(Youngsoo Seo) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.10
In this paper, a tile projector for the active control of low-frequency underwater echoes is studied using finite element method. Compared to the existing underwater actuators used for echo reduction, the tile projector is better suited for covering a wide area such as the hull of a submarine. In order to actively match the acoustic impedance at the water-object interface, the projector is driven to radiate a pressure wave that is the inverted replica of the echo at the interface. Finite element simulations demonstrate significant echo reductions due to the active impedance matching by the tile projector.