• 제목/요약/키워드: agency for defense development

검색결과 3,888건 처리시간 0.037초

A Study of the Sintering Behavior on the TZM Alloy

  • Lee Seong;Kim Eun-Pyo;Lee Sung-Ho;Kim Young-Moo;Hong Moon-Hee;Noh Joon-Woong
    • 한국분말야금학회:학술대회논문집
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    • 한국분말야금학회 2004년도 International Symposium on Powder Materials and Processing
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    • pp.19-19
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    • 2004
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MAPLE 0310 동해 정합장처리 실험 (Matched Field Processing in the East Sea of Korea : MAPLE 0310)

  • 박정수;김성일;홍준석;김영규;김의형;김형수;김영선;나영남
    • 한국음향학회:학술대회논문집
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    • 한국음향학회 2004년도 춘계학술발표대회 논문집 제23권 1호
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    • pp.207-210
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    • 2004
  • 수직선배열과 이동음원을 이용하여 수심이 140m인 동해 연안에서 정합장처리 실험을 실시하고 신호를 분석하였다. Battlett, MVDR, WMGC 정합장처리기를 이용하여 음원위치추정을 수행하였다. 실험 해역의 수온구조는 내부파등의 단주기 변동의 영향을 크게 받는 것으로 알려져 왔으며, 정합장처리 결과에서도 단주기변동의 영향을 받아 부엽준위가 증가하였다.

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잠수함용 소나성능예측시스템 SAIMS 1.0 개발 (Develoment of Submarine Acoustic Information Management System 1.0)

  • 나영남;김영규;김성일;조창봉;김형수;이용곤;이성호
    • 한국음향학회:학술대회논문집
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    • 한국음향학회 2004년도 춘계학술발표대회 논문집 제23권 1호
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    • pp.195-198
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    • 2004
  • 국과연은 현재 해군에서 운용중인 잠수함의 주요 장비와 연동하고 소나의 탐지성능예측이 가능한 시스템 SAIMS1.0을 개발하였다. 본 시스템의 설계 개념은 다음과 같다. 1) 저주파$\~$고주파 영역 음장계산을 위한 음향모델을 실용화하여 탑재한다. 2) 함 탑재장비와 ENC 기반 전술정보처리용 해도를 연동하여 생산된 음탐정보의 적용성을 최대화한다. 3) 광해역에 대한 정밀 DB를 구축하여 운용한다. 4) CTD 정보로부터 수직음속구조를 추정하는 알고리즘을 개발/탑재한다. 개발된 시스템은 '03.10.-'04.2. 기간 실시된 시험평가를 통해 적용성을 검증하였다.

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Performance Analysis of WADGPS System for Improving Positioning Accuracy

  • So, Hyoungmin;Jang, Jaegyu;Lee, Kihoon;Park, Junpyo;Song, Kiwon
    • Journal of Positioning, Navigation, and Timing
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    • 제5권1호
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    • pp.21-28
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    • 2016
  • The Wide Area Differential Global Positioning System (WADGPS) that uses a number of Global Navigation Satellite System (GNSS) reference stations are implemented with various types and provide services as it can service a wide range of areas relatively. This paper discusses a constellation design of reference stations and performance analysis of the WADGPS. It presented performance results of static and dynamic users when wide area correction algorithm was applied using eight reference stations.

Development of Submarine Acoustic Information Management System

  • Na Young-Nam;Kim Young-Gyu;Kim Seongil;Cho Chang Bong;Kim Hyung-Soo;Lee Yonggon;Lee Sung Ho
    • The Journal of the Acoustical Society of Korea
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    • 제24권2E호
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    • pp.46-53
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    • 2005
  • Agency for Defense Development (ADD) developed the Submarine Acoustic Information Management System (SAIMS Version 1.0) capable of interfacing some submarine sensors in operation and predicting detection environments for sonars. The major design concepts are as follows: 1) A proper acoustic model is examined and optimized to cover wide spectra of frequency ranges for both active and passive sonars. 2) Interfacing the submarine sensors to an electric navigation chart, the system attempts to maximize the applicability of the information produced. 3) The state-of-the-art database in large area is built and managed on the system. 4) An algorithm, which is able to estimate a full sound speed profile from the limited oceanographic data, is developed and employed on the system. This paper briefly describes design concepts and algorithms embedded in the SAIMS. The applicability of the SAIMS was verified through three sea experiments in October 2003-February 2004.

Development of Tungsten Heavy Alloy with Hybrid Structure for Kinetic Energy Penetrator

  • Baek, Woon-Hyung;Kim, Eun-Pyo;Song, Heung-Sub;Hong, Moon-Hee;Lee, Seong;Kim, Young-Moo;Lee, Sung-Ho;Noh, Joon-Woong;Ryu, Joo-Ha
    • 한국분말야금학회:학술대회논문집
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    • 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part2
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    • pp.944-945
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    • 2006
  • A new tungsten heavy alloy with hybrid structure was manufactured for the kinetic energy penetrator. The tungsten heavy alloy is composed of two parts: core region is molybdenum added heavy alloy to promote the self-sharpening; outer part encompassing the core is conventional heavy alloy to sustain severe load in a muzzle during firing. From ballistic test, it was found that the penetration performance of the hybrid structure tungsten heavy alloy is higher than that of conventional heavy alloy. This heavy alloy is thought to be very useful for the penetrator in the near future.

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