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비음향신호(난류항적)를 이용한 대잠 탐색 및 감시체계 적용방안 연구
이용철,임세한,박종진,진종한,강웅,이문진,김윤배,Lee, Yong-Chol,Lim, Se-Han,Park, Jong-Jin,Jin, Jong-Han,Knag, Woong,Lee, Mon-Jin,Kim, Yun-Bae 한국군사과학기술학회 2012 한국군사과학기술학회지 Vol.15 No.2
Using Shear-free Ship wake theory it was predicted the detectable submarine's turbulent wake on the sea surface was about 12km long when there was no breaking waves on the sea surface. It means that there are sufficient detectable turbulent kinetic energies on the sea surface as well as in the water. In this paper, we have proposed some concepts of non acoustic anti-submarine surveillance systems; SAR for sea surface surveillance, LIDAR for sub-surface surveillance and propelled gliders for under -water surveillance.
이용봉(Yong Bong Lee),정성수(Sung Soo Jung),진종한(Jong han Jin) Korean Society for Precision Engineering 2011 한국정밀공학회지 Vol.28 No.5
Accelerometers have been exploited widely in various fields from monitoring vibration of precision machines to detecting an earthquake wave. The precision calibration of the accelerometers is required to maintain the measurement reliability when measuring the vibration of objects with accelerometers for modal analysis. Among evaluation factors for determining sensitivity of accelerometers, phase delay term should be also considered for accurate calibration. In this paper, a new calibration system of accelerometers capable of measuring phase delay as well as magnitude of its sensitivity was proposed and realized in the frequency range of 20 ㎐ to 5 ㎑.