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생존체계 위협조우 상황인지를 위한 복합/다중 위협상황 Emulation 연구
이문석,이정원,Lee, Moon-Seok,Lee, Jung-Won 한국정보통신학회 2010 한국정보통신학회논문지 Vol.14 No.10
무기체계의 현대화 및 복잡화에 따라 현대전 상황에서의 플랫폼 및 운용자에 대한 생존성 확보를 필요로 하게 되었다. 현대 전장의 복합 및 다중 위협상황 무기체계에 대응하기 위하여 다수의 무기체계 플랫폼에서 생존체계를 함께 탑재하게 된다. 생존체계는 무기체계 플랫폼을 위협하는 위협들을 탐지/식별하며 효율적인 대응을 통하여 운용자로 하여금 정확한 상황인지를 가능하게 하고 플랫폼의 생존 능력을 향상시킨다. 생존체계가 보유하여야 할 중요 성능 인자는 복합 및 다중 위협에 대한 처리를 통하여 생존성을 확보하는 것이다. 이에 본 논문에서는 레이다, 레이저, 미사일 단일 위협상황을 조합한 복합 위협상황을 다룸으로 하여 생존체계가 보유하여야 하는 위협통합 알고리즘을 제시하고, 복합 위협상황을 Emulation하는 시스템을 실험실 환경에서 구현하여 위협통합 알고리즘에 대한 성능을 검증하였다. 이를 통해 생존체계가 플랫폼 탑재 이전에 성능 및 신뢰성을 확보할 수 있는 방안에 대하여 제시한다. As the substantial increase in battlefield density, multiple and complex weapon systems, Ensuring the Survivability of the platform has been emphasized. Most of platforms have equipped with ASE (Aircraft Survivability Equipment) system in order to protect the platform and operator against at modernized hostile weapon. ASE system enhance the survivability of the platform through providing accurate situation awareness information by detecting and countermeasuring hostile threats. One of Key factor of the AE system performance is handling multiple and complex threats. In this study, it describes the fact that the performance of ASE system with proposed threat integration algorithm is verified in the developed threat emulation system and also, suggests system verification method before deployment by dealing with complex threat situation.
이문석(Lee, Moon-Seok),박윤식(Park, Youn-Sik),박영진(Park, Young-Jin) 한국소음진동공학회 2008 한국소음진동공학회 논문집 Vol.18 No.7
A flexible structure submerged in acoustic fluid is affected by its surrounding fluid. In this case, the coupling effects between structures and surrounding fluid have an effect on the submerged structure as external force and change impedance of acoustic domain. Therefore, the coupling effects by its surrounding fluid complicatedly change the characteristics of a submerged structure such as natural frequencies and damping coefficients. In this paper, using the analytic modal equation of a spherical shell surrounded by water and air, the complex changes of damping coefficients and natural frequencies of submerged structures are studied for various external acoustic fluid and structures.
매크로 합성섬유를 혼입한 철근콘크리트 슬래브의 휨 강도평가
이문석(Lee, Moon-Seok),정주홍(Chung, Joo-Hong),손동희(Son, Dong-Hee),최창식(Choi, Chang-Sik) 대한건축학회 2020 대한건축학회논문집 Vol.36 No.12
In this study, the flexural strength of Concrete slabs mixed Macro synthetic fibers were evaluated according to foreign standards and preceding research. The mechanical properties of concrete mixed with macro synthetic fibers were evaluated through material tests. The flexural strength and residual strength of the slab were calculated and evaluated for comparison by referring to foreign standards and previous studies. After comparative evaluation, the evaluation result was confirmed through a structural test, and the effect of macro synthetic fibers on the structural performance was analyzed. The contents were analyzed for neutral axis, flexural strength, ductility, and crack control performance. As a result of the experiment, the flexural strength of the slab was increased by reinforcing macro synthetic fibers. In addition, crack control performance and ductility were also increased.
이문석(Moon Seok Lee),임지민(Ji Min Lim),이찬(Chan Lee),백홍선(Hong Sun Baik),황철하(Chulha Hwang) 한국소음진동공학회 2013 한국소음진동공학회 학술대회논문집 Vol.2013 No.10
A CTBA(Coupled Torsion Beam Axle) is a general type for rear suspension of small/compact sedans. It connects left and right knuckles using torsion beam axle and trails rear wheels . Therefore, a CTBA performs a main role of ride & handing. But, a CTBA suspension has main bending mode around 120Hz and causes road booming noise in the interior of a car. Therefore, the mode control of a CTBA is very important for reducing road noise. In this paper, we optimized the shape of a CTBA to reduce road noise considering R&H performance, simultaneously. The vibration mechanism of CTBA was investigated using ODS(Operational Deflection Shape) and mode shape.