• Structural Monitoring and Maintenance
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• 제1권3호
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• pp.293-308
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• 2014

In the aeronautical environment, numerous regulatory and communication protocols exist that cover interconnection of on-board equipment inside the aircraft. Developed and implemented by the airlines since the 1960s, these communication systems are reliable, strong, certified and able to contact different sensors distributed throughout the aircraft. However, the scenario is slightly different in the structural health monitoring (SHM) field as the requirements and specifications that a global SHM communication system must fulfill are distinct. The number of SHM sensors installed in the aircraft rises into the thousands, and it is impossible to maintain all of the SHM sensors in operation simultaneously because the overall power consumption would be of thousands of Watts. This design of a new communication system must consider aspects as management of the electrical power supply, topology of the network for thousands of nodes, sampling frequency for SHM analysis, data rates, selected real-time considerations, and total cable weight. The goal of the research presented in this paper is to describe and present a possible integration scheme for the large number of SHM sensors installed on-board an aircraft with low power consumption. This paper presents a new communications system for SHM sensors known as the Bi-Instruction Link Bi-Operator (BILBO).

• 대한기계학회논문집B
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• 제26권8호
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• pp.1153-1163
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• 2002

A transient analysis on temperatures of fuel and oil in hydraulic and lubrication systems in an aircraft was studied using the finite difference method. Numerical calculation was performed by an explicit method with modified Dufort-Frankel scheme. Among various missions, air superiority mission was considered as a mission model with 20% hot day ambient condition in subsonic region. The ambience of the aircraft was assumed as turbulent flow. Convective heat transfer coefficient were used in calculating heat transfer between the aircraft surface and the ambience. For an aircraft on the ground, an empirical equation represented as a function of free-stream air velocity was used. And the heat transfer coefficient for flat plate turbulent flow suggested by Eckert was employed for in-flight phases. The governing equations used in this analysis are the mass and energy conservation equations on fuel and oils. Here, analysis of fuel and oil temperature in the engine was not carried out. As a result of this analysis, the ground operation phase has shown the highest temperature and the largest rate of temperature increase among overall mission phases. Also, it is shown that fuel flow rate through fuel/oil heat exchanger plays an important role in temperature change of fuel and oil. This analysis could be an important part of studies to ensure thermal stability of the aircraft and can be applicable to thermal design of the aircraft fuel system.

• Strategy21
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• 통권41호
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• pp.30-51
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• 2017

Neighboring powers in the Korean Peninsula have started to develop and operate aircraft carriers or equivalent forces to cope with rising North Korean nuclear and missile threats and also to show its national might. For example, the United States has added a aircraft carrier from the 3rd fleet to western pacific theater of operation, while Peoples Republic of China is undergoing operational test of Liaoning as well as preparing for christening of its 2nd aircraft carrier. Japan is flexing its muscle as well by deploying Izumo capable of operating F-35B to Southeast Asia to participate in multilateral exercises starting this year. It is a high time to know more about aircraft carriers or similar types in terms of maritime strategy and history. The U.S. has had by far the vast amount of experiences in utilizing aircraft carrier that it would be beneficial for us to examine U.S. perspectives and its application in the Korean Peninsula. It will provide us with insights to understand and predict what it would be like in times of crisis in the Korean Peninsula in the perspective of aircraft carrier's involvement. This paper intends to show some aspects of future conflicts in the Korean Peninsula and how the ROK Navy can best be ready for such situation. For research purpose, U.S. maritime strategy has been developed in stages ; establishment phase, WWI phase, WWII phase, Cold war phase, post Cold war phase. Each phase includes such factors as threats, strategic concept, applications, and ways to improve maritime strategy. Finally, the role of aircraft carrier based on past history as well as future conflict shines the importance to have power projection capabilities for the ROK Navy. The intrinsic nature of the navy in the world is to project power ashore just as history proved it.

• 한국컴퓨터정보학회논문지
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• 제25권4호
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• pp.189-195
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• 2020

연인원 3천만 명이 넘은 한국인 해외 여행객이 항공기를 이용하고 있다. 탑승객 중 기내 불법행위자가 급증하면서, 항공기 테러에 대한 불안감도 가중 되고 있다. 이러한 항공기 테러는 많은 인명피해를 야기하므로 현재의 항공보안 시스템상의 문제점을 분석하고 그 대안을 제시하는 것이 연구의 목적이다. 연구의 방법론으로는 항공기 테러의 현황과 현행 항공관련 법령과 테러방지법 등의 관련 규정들과 선행연구들을 검토하는 문헌적 연구방법론을 택하였다. 연구내용은 항공보안법과 테러방지법과 긴밀히 공조되지 못함과, 항공보안 인력양성의 문제점, 항공기 파손, 납치죄 등에 대한 처벌상의 문제점 등을 분석하였다. 연구의 결론으로는 공항에서의 위험화물과 기내 불법행위와 테러 위험 인물들을 사전에 찾아내는 보안업무, 항공기에 탑승하는 보안요원, 외사경찰, 정보기관 등의 역할과 개선방안, 처벌규정의 개선 및 법적인 사각지대와 흠결을 보완하는 대안을 제시하여 항공기 테러 방지를 통 한 항공보안 체계를 제시하였다. 시사점은 항공교통이 증가하는 현대 사회에서 항공보안을 위한 정책 수립과 개선입법에 활용 될 것이라고 전망된다.

• 항공우주시스템공학회지
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• 제15권5호
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• pp.106-112
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• 2021

본 논문에서는 군에서 운용하고 있는 회전익 항공기의 후방 동체 상부에 블레이드 형상을 가진 안테나 장착 설계와 구조 건전성 해석을 수행하였다. 항공기 운항 중 안테나 또는 지지 구조물이 파손되면 기체에서 분리되어 로터 부위 및 블레이드와 충돌할 수 있다. 이 경우 항공기가 추락에 이를 수 있는 위험한 상황이 되기 때문에 반드시 개조 구조물들에 대한 구조 해석을 통해 구조적인 안전성을 확보해야 한다. 안테나 신규 장착 부위와 개조 부위에 대한 설계 요구 조건을 분석하고, 개조 전/후 항공기에 작용하는 하중을 적용하였다. 본 연구에서는 안테나 신규 장착 부위와 개조 부위에 대한 설계 요구 조건을 분석하고, 개조 전/후 항공기에 작용하는 하중을 적용하여 지지 구조물에 대한 구조해석을 수행하여 안전성을 확보하였다. 유한요소 모델을 구성하여 응력과 변형량을 확인하고 이론적인 분석 방법을 통해 유한요소 모델을 검증하였다. 이를 토대로 설계된 구조물의 구조 건전성을 확인하였다.

• 한국항행학회논문지
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• 제28권1호
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• pp.37-43
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• 2024

국가항공기는 국제민간항공협약의 적용 예외 대상이지만 각 국가는 타당한 고려 (due regard)를 통해 민간항공기의 안전을 확보해야 한다. 이에 따라 우리나라 항공안전법도 국가항공기는 법의 적용을 예외로 하고 있으나 해양경찰 항공기는 5개 조항에 대하여 법의 적용을 받도록 입법되었다. 해양경찰 항공기가 국제법과 국내법의 일부 조항의 적용하에 운용됨에 따라 서해상 공해인 잠정조치수역 상공 비행시 중국 민간항공관제기구로부터 비행절차에 대한 통제를 요구받게 된다. 중국의 이러한 요구는 해양경찰 항공기 본연의 임무인 국민의 안전을 보호하는 역할을 수행하는데 커다란 제한요소가 되고 있기에, 본 연구를 통해 범 국가적 차원에서 이러한 문제점을 해결할 수 있는 대안을 제시하였다.

• 항공우주시스템공학회지
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• 제1권3호
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• pp.13-20
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• 2007

The objective of this study is to investigate endurance test of localization part for T-50 aircraft engine. Major localization parts of the engine (F404-STW-102) was performed using Accelerated Simulated Mission Engine Test. The purpose of this test is to evaluate of quality demonstration capability, to verify design of engine localization parts, and to improvement safety and operation rate of T-50 advanced trainer by finding out operational problems in production phase and fixing it.

• 한국항공운항학회:학술대회논문집
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• 한국항공운항학회 2016년도 춘계학술대회
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• pp.95-98
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• 2016

It is true that Aircraft accident investigation organization of Republic of Korea does not have independent role structurally and administratively. Also, in the event of an aviation accident it does not take the appropriate response and post-institutional measures for victims and their families support. With aware of this fact and to improvement this research paper present approach direction and suggestion of issues and implications for those by researching the operational practices of the United State's Victim Family support.

• 정보와 통신
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• 제7권3호
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• pp.27-34
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• 1990

The $(L,\psi)$ feature description on the binary boundary air craft image is introduced of classifying 3-D object (aircraft) identification. Three types for associative matrix memories are employed and tested for their classification performance. The fast association involved in these memories can be implemented using a parallel optical matrix-vector operation. Two associative memories are based on pseudoinverse solutions and the third one is interoduced as a paralell version of a nearest-neighbor classifier. Detailed simulation results for each associative processor are provided.

• 항공우주시스템공학회지
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• 제4권2호
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• pp.16-20
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• 2010

In General, the hydraulic system of T-50 Advanced Trainer is applied to flight control system, wheel & Brake system and fuel system for aircraft operation. The hydraulic system is operation with pressure of 3000psi. and many mechanical parts which is operated by hydraulic system has been stressed in incomplete environment same as heat and friction. for example, Oil leakage had occurred in the shutoff valve of FFP used in a certain period of time. After study, The crack progressed by fatigue due to the irregular hydraulic pressure and vibration has been identified as the reason of oil leakage. This paper presents life cycle extension plans of FFP shutoff valve by configuration improvements of shutoff valve and FFP hydraulic motor.