• Journal of the Korea Society for Simulation
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• v.26 no.3
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• pp.105-113
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• 2017

This study considers an optimal investment planning for improving survivability from an air threat in the layered air defense system. To establish an optimization model, we first represent the layered air defense system as a network model, and then, present two optimization models minimizing the failure probability of counteracting an air threat subject to budget limitation, in which one deals with whether to invest and the other enables continuous investment on the subset of nodes. Nonlinear objective functions are linearized using log function, and we suggest dynamic programming algorithm and linear programing for solving the proposed models. After designing a layered air defense system based on a virtual scenario, we solve the two optimization problems and analyze the corresponding optimal solutions. This provides necessity and an approach for an effective investment planning of the layered air defense system.

• Defense and Technology
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• no.5 s.123
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• pp.38-45
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• 1989

북한은 현재 완전한 선진 군수산업을 이루고 있다. 한때 재원 부족으로 어려움을 겪기도 하였으나, 개량형 Scud미사일 개발을 추진해 오고 있으며, 이란의 대규모 무기구매로 재정적인 어려움이 풀린 것으로 보인다. 그러나 장비가 정교하지 못하며, 최신의 사격통제 및 포 조준 컴퓨터나 대공사통장비등의 생산을 도와줄 전자산업의 낙후가 문제로 남아 있다. 이것은 군수산업에서의 중요한 결함이다

• Defense and Technology
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• no.11 s.177
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• pp.38-49
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• 1993

2차대전 중에 감행된 항공기에 의한 대지상공격의 특징은 수십, 수백 대의 폭격기들을 동시에 동원한 대공습으로 많은 인명이 살상되었습니다 그러나 걸프전에서 다국적군은 항공기가 파격될 위험을 감내하면서 정밀한 타격능력을 가진 유도탄이나 공대지미사일로 민간인 지역을 피해가며 목표물만 정확히 공격하였습니다 그 결과로 다수의 나라로부터 역침공에 대한 외교적 묵인 또는 지원을 얻어내는데 성공하여, 전장에서의 승리와 함께 외교전에서도 완벽한 승리를 할수 있었습니다

• Digital Contents
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• no.4 s.47
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• pp.22-32
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• 1997

과학기술분야에서 인터넷을 어떻게 활용할 수 있을지, 자신의 분야에 최적으로 이용하면서 맹신의 과오를 범하지 않는 것이 정보화시대의 무기가 될 수 있다. 인터넷의 활용방안과 주요 검색엔진의 과학기술정보를 소개한다. 국내에 전문 과학기술정보원도 운용되고 있으며, 해외의 정보원도 많이 알고 있을수록 유용할 것이다. 그외 천리안이나 원문제공기관을 통한 정보입수는 어떻게 하면 되는지 살펴본다.

• Journal of the Korea Society of Computer and Information
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• v.9 no.1
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• pp.63-70
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• 2004

This paper describes modeling, design and performance test results of infrared thermal image target system which can generate infrared thermal image on aircraft. The system is designed to control image shape and intensity so that the infrared image shape and its emitting intensity are so similar to that of real aircraft. When applying the technique suggested in this paper, the system consumes only small electric power energy about 30(㎾) to generate infrared thermal image which is equivalent to that of real aircraft under full power operation. After verifying performance test, the system developed here has been used as a target for korean potable surface to air missile(KPSAM) at the stage of evaluation test such as target adaptive guidance test and auto-pilot logic test.

• Korean Journal of Optics and Photonics
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• v.30 no.1
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• pp.1-7
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• 2019

MANPADS (man-portable air defense system) is a counterweapon system against enemy aircraft, tracking the MWIR (mid-wavelength of infrared) signature of the plume. Under foggy conditions, however, multiple scattering phenomenon caused by the particles affects the MWIR transmittance, and the MANPADS detection performance. Therefore, in this study we analyzed the lock-on range of MANPADS with varying fog conditions and plume characteristics. To analyze the optical extinction properties and transmittance in fog, Mie scattering theory and analytic solution of the radiative-transfer equation are utilized. In addition, we used flare signature as an alternative MWIR light source. We confirmed that the lock-on range could be noticeably reduced under conditions of mist, and proportional to the flare temperature.

• Annual Conference of KIPS
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• 2012.11a
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• pp.1460-1463
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• 2012

본 논문은 대형복합 체계인 국방무기체계를 설계 프로세스에 따라 SysML 을 적용하여 개발하는 방법 및 사례에 대해 다룬다. ISO-IEC 15288 에 제시된 기술 프로세스의 핵심 단계인 요구사항 분석, 기능 분석, 이키텍처 설계를 모델 기반으로 수행하는 것은 이해관계자 사이의 의사소통을 원할히 유지하는 효과적인 방법이다. 더불어 SysML 을 기반으로 작성된 체계 모델은 S/W 설계를 위해 많이 사용되는 UML 과 설계 일관성을 유지하기 용의하다. 본 논문은 SysML 을 통해 체계 개발에 필요한 단계별 모델의 종류와 사용방법을 대공유도무기 사례를 통해 제안하고자 한다.

• The Journal of the Korea Contents Association
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• v.21 no.5
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• pp.499-507
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• 2021

This study compares the educational effect using real equipment, virtual reality, and video to improve the educational and training effect of the army and verifies which method of education is excellent. The Army has made a lot of efforts to realize the actual training environment, however, it is increasingly difficult to provide the actual training environment because of 1) restrictions on securing training sites and urbanization, 2) deepening conflicts with the people, and 3) difficulties in acquiring defense budget. To resolve these issues, the use of virtual reality(VR) has the advantage to experience actual battlefield indirectly and could save budget by training in a virtual battlefield environment. In particular, in the case of dangerous or expensive weapons systems, is further required. Hence this paper studies how effective virtual reality is compared to the actual weapons system. virtual reality(VR) education is less effective than actual equipment education, but it is higher than video education. Based on this research result, it will be used as a basic data for the analysis of educational effects based in virtual reality(VR).

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.10
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• pp.174-180
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• 2020

This paper presents the development of a tacho generator that is applicable to a DC motor for anti-aircraft weapon systems. In general, devices such as tacho generators and resolvers are used as feedback devices for controlling DC motors. A tacho generator with a wide operating temperature range was developed, which has robust characteristics against shock loads and vibrations according to the operational characteristics of anti-aircraft weapon systems. The target specifications were set based on the requirements of the tacho generator currently in operation. A rotor coupled to the shaft of the motor and a stator coupled to the housing of the motor were then designed and manufactured. The inductance was 31.0 mH, the terminal resistance was 147.7 ohms, and the rotational measurement factor was satisfactory under both normal operation and operating conditions after the maximum speed for the standard of 9.500 ± 0.475 V/krpm. In addition, the environmental suitability of the applied equipment was confirmed through the rate of change in unit temperature, and it was found that the temperature characteristics were all within 0.03 %/℃.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.37 no.12
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• pp.1099-1103
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• 2013

A combat vehicle needs to have an air-conditioning unit. Accordingly, new combat systems have tended to apply an integrated heating, cooling, and ventilating system. The air conditioning unit used depends on the combat vehicle's purpose of use. In this study, we studied an air-conditioning unit for an armored combat vehicle as a special use and military specification and tried to improve the air-conditioning unit's performance.