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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.
이영규(Young-kyu Lee),양성훈(Sung-hoon Yang),이창복(Chang-bok Lee),이종구(Jong-Goo Lee),박영미(Young-Mi Park),이문석(Moon-Seok Lee) 제어로봇시스템학회 2014 제어·로봇·시스템학회 논문지 Vol.20 No.6
In this paper, we described the investigated theoretical time synchronization performances and experiment results obtained by commercially provided PTP (Precise Time Protocol) modules when the time of a slave clock is synchronized to the master clock. In the case of the theoretical performance analysis, we investigated 3 types of clock levels such as Crystal Oscillator (XO), TCXO (Temperature Compensated XO) and OCXO (Oven Controlled XO). From the analysis, it was observed that the synchronization performance is greatly influenced by the synchronization period and the required performance under 1 us can be achieved by using XO level clocks when the synchronization period is less than 2 seconds and the uncertainty of the propagation delay is under 100 ns. For the experiments using commercial PTP modules, the synchronization performance was investigated for direct, through 1 hub and through 2 hubs connections between the master clock and the slave clock. From the experiment results, we observed that time synchronization under 90 ns with 1,000 seconds observation interval can be achieved in the case of direct connection.
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.
이문석(Moonseok Lee),박윤식(Youn-sik Park),박영진(Youngjin Park) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
A transfer case is a main device of 4WD. It must optimally distribute torque to front wheels and rear wheels according to various driving conditions to reduce tire slip. Optimally distributing torque between front and rear wheel is very important to improve driving performance. This research shows that basic torque distribution ratio depends on mass center. We designed a transfer case controller considering mass center and longitudinal acceleration, which shows good driving performance at accelerated cornering.