• 한국군사과학기술학회지
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• 제20권3호
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• pp.315-327
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• 2017

In this paper, we present a method for estimating of position and velocity of a moving target by using the range and the bearing measurements from multiple sensors of aiming unit. In many cases, conventional low cost gyro sensor and a portable laser range finder(LRF) degrade the accuracy of estimation. To enhance these problems, we propose two methods. The first is background image tracking and the other is principal component analysis (PCA). The background tracking is used to assist the low cost gyro censor. And the PCA is used to cope with the problems of a portable LRF. In this paper, we prove that our method is robust with respect to low-frequency, biased and noisy inputs. We also present a comparison between our method and the extended Kalman filter(EKF).

• 한국전산유체공학회지
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• 제20권1호
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• pp.99-104
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• 2015

Aero-optic phenomena cause the image position displacement on an imaging plane of the airborne optical/IR systems. Particularly, the aero-optic boresight error(BSE) is important factor for homing, positioning and aiming applications of hypersonic flight interceptor missile. In this paper, an estimating method of aero-optic BSE for a hypersonic flight vehicle is studied. A ray tracing method and a transform method of refractive index fields from flow density fields are combined with computational fluid dynamics(CFD) method.

• Journal of the Optical Society of Korea
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• 제19권5호
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• pp.444-448
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• 2015

We describe the radiative transfer of a Gaussian beam in a water medium using the Monte Carlo method offering basic propagation behaviors. The simulation shows how the energy of the initial Gaussian beam is redistributed as it propagates in coastal water, and also depicts the dependence of the propagation behavior on inherent optical properties of the ocean water such as the single scattering albedo as well as on laser beam parameters, e.g. the M squared. Our results may widen the applicability of LIDARs by providing a couple of design considerations for a bathymetric LIDAR.

• 한국군사과학기술학회지
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• 제13권6호
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• pp.1113-1120
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• 2010

In this paper, we have proposed Architecture Development methodology which can connect both operational view and system view. The Functional Architecture can connect both user and developer, and it is located between Activity analysis and System analysis. We suggest the new architecture methodology using the Functional Architecture and it provides effect to analyze the connection between user(military) and developer(enterprise) in Defence R&D and the new Architecture with the feedback analyze activity on a point of system view and the new architecture make the functional architecture.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2005년도 제31회 KOSCO SYMPOSIUM 논문집
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• pp.268-268
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• 2005

• 한국군사과학기술학회지
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• 제18권3호
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• pp.226-233
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• 2015

Pose estimation is an important operation for many vision tasks. This paper presents a method of estimating the camera pose, using a known landmark for the purpose of autonomous vertical takeoff and landing(VTOL) unmanned aerial vehicle(UAV) landing. The proposed method uses a distinctive methodology to solve the pose estimation problem. We propose to combine extrinsic parameters from known and unknown 3-D(three-dimensional) feature points, and inertial estimation of camera 6-DOF(Degree Of Freedom) into one linear inhomogeneous equation. This allows us to use singular value decomposition(SVD) to neatly solve the given optimization problem. We present experimental results that demonstrate the ability of the proposed method to estimate camera 6DOF with the ease of implementation.

• 한국군사과학기술학회지
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• 제21권1호
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• pp.47-60
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• 2018

In this paper, we proposed a method for eliminating aiming error of unguided anti-tank rocket using improved target tracking. Since predicted fire is necessary to hit moving targets with unguided rockets, a method was proposed to estimate the position and velocity of target using fire control system. However, such a method has a problem that the hit rate may be lowered due to the aiming error of the shooter. In order to solve this problem, we used an image-based target tracking method to correct error caused by the shooter. We also proposed a robust tracking method based on TLD(Tracking Learning Detection) considering characteristics of the FCS(Fire Control System) devices. To verify the performance of our proposed algorithm, we measured the target velocity using GPS and compared it with our estimation. It is proved that our method is robust to shooter's aiming error.

• 한국추진공학회지
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• 제17권6호
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• pp.97-104
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• 2013

Guanylurea-dinitramide(GUDN)는 낮은 감도와 좋은 성능을 가진 에너지 물질로서 추진제 및 둔감 탄약에 사용할 수 있다. 고에너지 고밀도 화약인 GUDN의 효과적인 합성과 특성분석을 이화학적 분석 및 원소분석을 통하여 수행하였다. Gaussian 09 프로그램을 사용하여 생성열을 계산하였다. 화약의 안전한 취급을 위해서 충격 및 마찰 감도를 BAM 방법으로 측정하였다.

• 한국군사과학기술학회지
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• 제22권1호
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• pp.124-134
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• 2019

As the types of North Korea's provocation are diverse and unexpectable in the costal area, ROK navy needs to develop countermeasures, such as costal defence guided rockets. Recently ROK navy developed the PKX-B which is equipped with the new 130 mm guided rocket. The most popular rockets are LOGIR for short range targets, 130 mm guided rocket for middle range targets and Spike-NLOS for long range targets. As various guided rockets are developed, it is required to develop a guided rocket analysis model and it's analysis methodology. In addition, these guided rockets can be installed on any platforms; ground vehicle, aircraft and warship. The paper proposes systematic methodology to estimate the operational effectiveness of costal defence guided rockets. A case study exploiting the ARENA simulation model is explained to demonstrate the implementation of the proposed methodology.

• 한국산학기술학회논문지
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• 제19권9호
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• pp.501-507
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• 2018

무기체계의 복잡성과 현대화로 인해 군수품을 생산하는 방위산업체의 역할은 점점 더 중요시되고 있다. 과거 내수위주의 방위산업은 가격 경쟁력이 제품 선택의 주요 요소였다. 하지만, 오늘날 우수 품질을 바탕으로 국내 군수품에 대한 수출이 급속도로 확대되고 있는 실정이며 국내 방위산업체의 경영의 효율성을 객관적으로 평가할 수 있는 방안이 필요 시 되고 있다. 본 연구에서는 의사결정 방법론 중 하나인 자료포락분석기법(Data Envelopment Analysis, DEA)를 활용하여 경영효율성을 측정하고자 한다. 본 연구에서 DEA를 활용하기 위해 투입 변수로 종업원수(품질부서), R&D현황을 설정하였고 출력 변수로는 매출액 및 영업이익을 설정하였다. 방산업체의 효율성을 분석하기 위해 불면 규모수익을 가정하는 CCR(harnes, Cooper and Rhodes)모형과 수익변동모형을 가정하는 BCC(Banker, Charnes and Cooper)모형을 모두 분석하였으며 규모효율성(Scale Efficiency: SE) 값을 도출하여 비효율적인 DMU의 원인을 분석하였다. 분석 결과를 바탕으로 국내 방위산업체의 수준 평가 및 비효율적인 DMU의 원인을 분석하였으며 마지막으로 국내 방산업체의 발전 방안을 도출하였다.