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하종수,김대웅,Ha, Jong-Soo,Kim, Dae-Woong 한국정보통신학회 2013 한국정보통신학회논문지 Vol.17 No.6
이안식 일체형 입체카메라는 줌인시 고정된 컨버전스포인트로 인해 촬영된 영상 시청시에 어지러움을 유발하는 시각적 불편이 발생할 수 있다. 본 논문에서는 이안식 일체형 입체카메라에서 줌인시 발생되는 시각적 불편을 방지하기 위해 컨버전스 포인트를 조정하는 기법을 제시한다. 포커스, 피사체 및 컨버전스포인트의 위치에 따른 관계모델을 제시하고 각각에 따라 컨버전스포인트를 조정하여 시각적 불편을 최소화하는 기법을 제안한다. 또한 제안한 기법을 실제로 구현하여 제시한 방법의 우수성을 입증한다. Even though a dual lens stereoscopic camera allows for convenient stereoscopic photography, the necessity for the research comes up, since the dual lens stereoscopic camera can cause visual discomfort during zoom-in due to the fixed convergence point. We propose a method based on which a convergence point can be adjusted to prevent visual discomfort during zoom-in for a dual lens stereoscopic camera. First, the relational model is classified into nine kinds and defined, depending on locations of focus, object, and convergence point. And then, the method to minimize visual discomfort is suggested by adjusting convergence point on the given model. We also implement the suggested methods with anaglyph computer graphic and demonstrate the superiority of them.
미사일/로켓 방어체계의 RPG-7에 대한 전차방호 성능분석
하종수,이의혁,이현아,박규철,조규공,Ha, Jong-Soo,Lee, Eui-Hyuk,Lee, Hyun-Ah,Park, Gyu-Churl,Cho, Kyu-Gong 한국군사과학기술학회 2014 한국군사과학기술학회지 Vol.17 No.3
MRDS is a short range missile/rocket defense system which protects a main battle tank(MBT) from threats at a short range. It is composed of 2 radars, 2 infrared trackers(IRT)s, 1 fire control computer(FCC), 2 launchers and countermeasures. In this paper, the radar and the IRT models based on sensing errors, the FCC model based on filtering errors, the launcher model based on driving errors and the countermeasure model based on flying errors are proposed to analyze the defense performance with the approaching RPG-7 and the moving MBT. The simulation results are presented to evaluate and verify the effectiveness of the proposed method.
방위각 변화율을 이용한 방호용레이다 위협 판단 알고리즘
하종수,Ha, Jong-Soo 한국군사과학기술학회 2008 한국군사과학기술학회지 Vol.11 No.1
It is difficult for a MWR(Missile Warning Radar) to perform a threat decision accurately since there is no tracking part which gives more accurate threat information to the MWR. In this paper, the threat decision algorithm is proposed using an azimuth angular rate to improve the accuracy. The azimuth angular rate is dependent upon the direction of an approaching target. The target is classified into a threat or non-threat using a boundary condition of the azimuth angular rate. The boundary condition is determined using the Monte-Carlo simulation. The performance of the proposed algorithm is evaluated using this condition at field tests of MWR. The efficiency of the proposed method for the threat decision is proved by comparing the results of field tests with the simulation results.
하종수,이의혁,이현아,박규철,조규공,Ha, Jong-Soo,Lee, Eui-Hyuk,Lee, Hyun-Ah,Park, Gyu-Churl,Cho, Kyu-Gong 한국군사과학기술학회 2014 한국군사과학기술학회지 Vol.17 No.3
MRDS is a short range missile/rocket defense system which protects a main battle tank(MBT) from threats in a short range. It is composed of 2 radars, 2 infrared trackers(IRTs), 1 fire control computer(FCC), 2 launchers and countermeasures. To guarantee the performance of the MRDS, these components have to be mounted on the vehicle with the known positions and directions and it is required to compensate the alignment errors. In this paper, a system alignment method using angular error compensation is proposed to install its components within a tolerance on the MBT. The test results are presented to evaluate and verify the effectiveness of the proposed method.
하종수,박규철,Ha, Jong-Soo,Park, Gyu-Churl 한국군사과학기술학회 2009 한국군사과학기술학회지 Vol.12 No.5
To analyze and verify the performance of a pulse radar without the real target data, there is a need to make the simulated signal which is similar to the received signal of the real target. In this paper, a method of the received signal generation for the pulse radar is proposed to solve the above need. The user-made scenarios are used to model the fast and small target and the clutter data based on the ground environment. These data are transformed into the electric signal using the proposed method. The efficiency of the proposed method is proved by comparing the signal of a field test with the simulated signal.
근거리 미사일방어시스템 성능분석을 위한 전차 구동 모델링 기법
하종수,조규공,Ha, Jong-Soo,Cho, Kyu-Gong 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.2
SRMD system which protects MBT from the threats in a short range is composed of 2 radars, 2 IRTs 1 CCU and 2 countermeasures. To analyze the performance of this system, there is a need to make the model of MBT on which this system is loaded. In this paper, a method of MBT movement modeling is proposed to fulfill the above need. The methods of the coordinate system transformation among the components and the modeling of a hull's traveling and a turret's turning are proposed. The method of the modeling of a pose variation caused by the vibrations is proposed and the results of the modeling are presented.
지상 기동 무기 체계 탑재 미사일 경고 레이더 시뮬레이터 설계
하종수(Jong-Soo Ha),박규철(Gyu-Churl Park) 한국전자파학회 2010 한국전자파학회논문지 Vol.21 No.4
지상 기동 무기 체계에 탑재되는 미사일 경고 레이더(MWR: Missile Warning Radar)의 성능을 분석하고 검증하기 위해서는 모의 신호를 생성하여 가상의 연동/교전 시험을 수행할 수 있는 시뮬레이터가 필요하다. 이를 위해 본 논문에서는 MWR 시뮬레이터의 설계 기법을 제안한다. 모의 신호를 생성하고 알고리즘을 분석하는 신호처리부와 생성된 모의 신호를 고주파 신호로 변환/방사하고 MWR과의 연동을 제어하는 고주파부의 설계에 대해 설명한다. 주 장비인 MWR의 개발에 대한 기여 결과를 제시함으로써 본 시뮬레이터의 실용성을 입증한다. To analyze and verify the performance of a MWR(Missile Warning Radar) of a GVWS(Ground Vehicle Weapon System), there is a need to make a simulator which can conduct the linked and engaged test virtually using the simulated signals. In this paper, a method of the simulator design for MWR is proposed to solve the above need. The SP(Signal Processor) part which generates the simulated signals and analyzes the algorithms is explained. The RF(Radio Frequency) part which transforms IF(Intermediate Frequency) signals into RF signals, radiates RF signals, and controls the linked equipments is also explained. The utility of the proposed design is proved by presenting the results of the contributions to the development of MWR.
지형대조항법의 신뢰성 추정을 위한 간섭계 레이더 고도계의 지형 유형별 성능 분석
하종수(Jong Soo Ha),이한진(Han Jin Lee),이수지(Soo Ji Lee),홍성용(Sung Yong Hong) 한국항공우주학회 2022 韓國航空宇宙學會誌 Vol.50 No.2
본 논문에서는 지형대조항법의 신뢰성 추정을 위해 지형 유형별로 간섭계 레이더 고도계의 성능을 분석한다. 고도 정확도는 지형대조항법 정확도의 주요 요소 중 하나이다. 그런데 간섭계 레이더 고도계에서는 안테나가 넓은 빔을 가지고 있으면 고도 정확도는 지표의 형상에 의해 직접적으로 영향을 받는다. 따라서 TRN의 정확도와 신뢰성도 영향을 받을 수 있으며 이는 항법해 산출에 모호성을 야기할 수 있다. 본 논문에서는 여러 지형 유형들을 모델링하고 간섭계 레이더 고도계의 성능을 분석하여 지형대조항법의 신뢰성 추정을 위한 분석 자료를 제시한다. 시험 데이터와 비교함으로써 분석 결과의 타당성을 검증한다. This paper analyzes the performance of the IRA(Interferometric Radar Altimeter) by terrain type for estimating reliability of TRN(Terrain Referenced Navigation). The accuracy of the altitude is one of the key parameters of TRN’s accuracy. When the antenna of the IRA has wide beamwidth, its altitude accuracy is directly affected by the configuration of the earth’s surface. Hence, the accuracy and reliability of TRN can also be affected and may cause ambiguity in positioning. We present analysis data for estimating the reliability of TRN by modeling several topographies and analyzing the performance of the IRA. The results of the analysis are verified by comparison with test data.
시험 결과를 이용한 원샷 시스템의 신뢰도 추정 방안 적용가능성 연구
하종수(Jong Soo Ha),박상현(Sanghyun Park),박영식(Young Sik Park) 대한산업공학회 2018 대한산업공학회지 Vol.44 No.4
This paper proposes a reliability estimation method of the one-shot system using test results. A reliability analysis of the one-shot system is necessary for presenting its reliability. However, it is difficult to analyze the reliability accurately because of its analysis error. One reason is that the reliability analysis is influenced by the time variable, while its operation time is too short to apply in the real test. To solve this problem, this study employes the functional reliability estimation and the storage reliability analysis. Some results of the estimation and the test are presented to demonstrate the feasibility of the proposed technique.