• Journal of the Korea Society for Simulation
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• v.28 no.2
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• pp.131-137
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• 2019

The operation of the precision-guided missiles with seekers is becoming more and more dominant since the modern wars became geographically localized like anti-terror campaigns and civil wars. Imaging seekers are relatively low-price and applicable to various operational conditions. The image tracker, however, requires highly advanced method for the target tracking under harsh missile flight condition. Missile roll can reduce the tracking performance since it introduces big differences in imagery. The missile roll is inevitable because of the disturbance and flight control error. Consequently, the errors of the subsystems should be under control for the stable performance of the tracker and the whole system. But the performance prediction by some simple metric is almost impossible since the target signature and the tracker are highly nonlinear. We established M&S tool for a precision-guided missile with imaging seeker and analyzed the roll effects to tracking and system performance. Furthermore, we defined the specification of missile subsystems through error analysis to guarantee system performance.

• Journal of Advanced Navigation Technology
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• v.22 no.2
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• pp.57-63
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• 2018

In the case of aircraft-launched guided weapons, various interface tests such as MIL-STD-1760 based power source, discrete signal, MUX communication as well as BIT of missile can verify system safety and reliability. The purpose of this case study is to develop a test bench based on MIL-STD-1760E for interoperability testing between aircraft and weapons. We proposed a testing method of the launch sequence based on the defined TIME LINE in the development phase of the missile system from the application of the power of the missile to the targeting, the transfer order, and the missile separation process. Furthermore, it will be a reference model that can maximize the verification scope in the development phase of the air to surface missile system by simulating abnormal situation to the inert missile using the error insertion function.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2010.04a
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• pp.670-673
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• 2010

무기저 손상 진단 기법은 능동센서를 이용하여 과거의 기저자료와 현재 상태에서 취득한 유도파의 정보를 비교하지 않고, 구조물의 현재 상태에서 취득한 신호만을 분석함으로써 구조물의 상태를 진단하는 기법이다. 온도 변화 및 하중 변화 등의 외부 환경의 변화에 민감한 유도파의 특성으로 인하여 기저자료를 이용하는 과거의 방법론은 현실적용성이 떨어질 우려가 있다. 본 무기저 손상 진단 기법은 외부 환경적 영향을 최소화함으로써 구조물의 상태를 효율적으로 진단할 수 있다. 최초, 본 연구진에서 제안하였던 무기저 기법은 두 쌍의 능동센서를 구조물에 양면 대칭으로 배치시켜 능동센서의 극성을 이용한 방법이었다. 하지만 실제 구조물의 양면에 완벽한 대칭성을 유지하며 능동센서를 배치시키는 것은 사실상 불가능하다. 이와 같은 한계점을 극복하기 위해 신개념의 듀얼 능동센서를 활용한 무기저 손상 진단 기법이 제안되었고, 수치해석 및 연구실 환경에서 제한적으로 그 실용성이 검증되었다. 본 논문에서는 무기저 손상 진단 기법의 실 구조물에의 적용성을 폐교량을 대상으로 검토하였다. 특히, 보강재를 포함하는 영역에서 본 기법을 적용함으로써 실제 구조물에 적용 가능성을 검증하였다.

• Convergence Security Journal
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• v.7 no.2
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• pp.145-154
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• 2007

In this paper, a study on the actuator device technology in guided weapon system development. Hydraulic and pressure, electric motor device had been mostly used, but recently due to high output to weight ratio, pressure actuator device is widely used except for small tactical guided ammunition which needed small power. And now the actuator design concept and technical level is changed because of high mobility of guided ammunition, development of magnetic materials which used new material for requirement of despondence, progress of control and electrodynamics technology, and digitalize and integrity. In this paper we clearly proposed the actuator design criteria and detailed technology development trend for next generation guided weapon system.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.2
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• pp.329-335
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• 2019

Reliability growth analysis was conducted for a guided weapons system. In the development phase, reliability management activities were continuously carried out by identifying failure modes and causes and analyzing faults found during the testing. The missile system consists of an all-up-round missile and a launcher, and the analysis was carried out according to the test results of each system. The test results for the all-up-round missile were obtained with discrete data, which were success and failure as a one-shot-device. The test results for the launcher were obtained with continuous data by operating the equipment continuously in the test. For each test result, the reliability growth model was applied to the Standard Gompertz model and the Crow-Extended model. The models were used to identify the growth analysis results of the test so far. It was also possible to predict the reliability growth results by assuming the future test results. The study results could be useful in achieving the desired reliability goal and in determining the number of tests. Then, the planned test will be confirmed and the growth analysis of the missile system will continuously be conducted.

• Proceedings of the KAIS Fall Conference
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• 2005.05a
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• pp.279-282
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• 2005

본 연구에서 광촉매 $TiO_2$/P-25를 알루미늄 금속판에 코팅하여 코팅 조건에 따른 IPA 분해 활성을 고찰한 결과, 무기계 바인더인 KR-400, 유$\cdot$무기복합 바인더인 TMOS, 유기계 바인더인 A-9540을 사용하여 코팅한 알루미늄 금속판의 표면상은 모두 깨끗하였다. 부착력은 무기계 바인더를 제외한 바인더에서 우수한 것으로 나왔다. 또한 IPA 분해 효율은 무기계 바인더 < 유$\cdot$무기 복합 바인더 < 유기계 바인더 순으로 나타났다. 유$\cdot$무기복합 바인더와 P-25의 비율을 10: 10, 8.3: 10, 6.6: 10, 5: 10, 3.3: 10, 1.6: 10으로 바꾸어 광분해 실험을 수행한 결과, 1.6:10일 때 IPA 분해 효율이 가장 우수하였다. 상용화된 타사(A사, B사) 제품과의 성능 비교 결과, 본 연구에서 사용한 바인더(A-9540): P-25의 비율을 1: 6으로 배합하여 코팅 한 알루미늄 판의 IPA분해 효율이 가장 우수하였다.

• Journal of the Korea Society for Simulation
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• v.24 no.2
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• pp.19-29
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• 2015

M&S techniques are utilized for various purposes on the national defense, and its importance is increasing than ever. For analyzing RAM (Reliability, Availability and Maintainability) of weapon system, using M&S techniques can be more effective and practical way than deterministic approach, because M&S approach can consider uncertain variables and various constraints in the ILS (Integrated Logistics support) field. For design of ILS M&S, we first set up a purpose of M&S, attributes of real system and other similar ILS M&S tool. Then, we convert real system into model which consists of mathematical formula and logical expression. In this thesis, we introduce modeling procedures of M&S that describes total life cycle of 'OO guided weapon system' and the contents proposed in this paper can provide references for developing other M&S tool.

• Fire Science and Engineering
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• v.31 no.4
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• pp.12-19
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• 2017

The present paper is a study on the performance characteristics of organic-inorganic hybrid flame retardants. MDF plywood has been used, that are being used for the interior decoration of building structures, to make the samples for experiment according to the existing or non-existing treatment of organic-inorganic hybrid flame resistants. Later, the experiment on the measurement of flame retardant performance using a $45^{\circ}$ flammability tester and the experiment on the measurement of combustion characteristic using a cone calorimeter have been proceeded to confirm the performance characteristic of organic-inorganic hybrid flame retardants. From the result of experiments, it has been confirmed that both organic-inorganic hybrid flame retardants have merits of inorganic and organic substances, and that heat resistance, durability and adhesiveness have been largely improved. The performance on the flame retardant has also appeared with excellent effect such as the reduced generation of combustion gas and the decreased generation of smoke.

• Defense and Technology
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• no.7 s.221
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• pp.44-51
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• 1997

지난호에 S-300V를 소개하면서 S-300 PMU-1 사진을 게재하여 이를 바로 잡습니다. S-300V는 이동형 대탄도탄 유도무기체계로 개발되었고 S-300 PMU-1은 원래 대항공기 방어를 주임무로 하는 드립니다. S-300 PMU 체계의 최신 개량형으로 서로 상이한 무기체계임을 알려드립니다. 아울러 패트리어트와 S-300V의 기사를 나누어 게재했으면 하는 의견이있어 이번호에는 패트리어트를 소개하고 8월호에 S-300V를 게재코자 합니다.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.35 no.3
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• pp.225-230
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• 2007