• 한국항공운항학회지
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• 제23권2호
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• pp.1-6
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• 2015

The RSA is intended to prevent the following five types of events from becoming an accident: landing overruns, landing undershoots, landing veer-offs, takeoff overruns and takeoff veer-offs. The improved models are based on evidence from worldwide accidents and incidents that occurred during the past 27 years. The analysis utilizes historical data from the specific airport and allows the user to take into consideration specific operational conditions to which movements are subject, as well as the actual or planned RSA conditions in terms of dimensions, configuration, type of terrain, and boundaries defined by existing obstacles. This paper shows how to apply the improved models for Risk Assessment of Runway Safety Areas (Airport cooperative research program(ACRP) Report 50) into an airport and the outcome differences between the old models based on ACRP report 3-Analysis of aircraft overrun and undershoots for runway safety areas and the new models from ACRP report 50 in the specific airport.

• 한국항공운항학회지
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• 제18권4호
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• pp.59-66
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• 2010

Aerospace structures need high stability and long life because many personal injuries can result from an accident and securing structural integrity for various external environments is more important than any other thing. So first of all we must prove the destruction properties for operating environment, have prediction technology about damage evolution and life, and develop an economical non-destructive technology capable of detecting structure damage. Acoustic emission (AE) have no need of artificial environment like ultrasonic inspection or radio fluoroscopy to emit a certain energy, is a testing technique using seismic signal resulting from interior changes of solids, and enables to observe if any fault is appeared and it grows seriously or not while running. In this study we suggest the method of structural integrity evaluation for aerospace structures through the acoustic emission technique, for which a model plane was manufactured and an actual operation test was conducted.

• 대한인간공학회지
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• 제27권3호
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• pp.43-52
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• 2008

Human errors are now considered as the most significant source of accidents or incidents in large-scale systems such as aircraft, vessels, railway, and nuclear power plants. As 61% of the train accidents in Korea railway involving collisions, derailments and fires were caused by human errors, there is a strong need for a systematic research that can help to prevent human errors. Although domestic railway operating companies use a variety of methods for analyzing human errors, there is much room for improvement. Especially, because most of them are based on written papers, there is a definite need for a well-developed computerized system supporting human error analyzing tasks. The purpose of this study is to propose a framework for a computerized human error analysis system focused on the railway industry on the basis of human error analysis mechanism. The proposed framework consists of human error analysis (HEA) module, similar accident tracking (SAT) module, cause factor recommendation (CFR) module, cause factor management (CFM) module, and statistics (ST) module.

• 한국항해항만학회지
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• 제34권5호
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• pp.319-324
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• 2010

국제해사기구(IMO)는 해양 사고의 예방 및 원인 분석을 목적으로 선박에 항해기록장치(VDR)의 설치를 의무화하였다. 그러나 해양사고의 약 10%를 차지하고 있는 전복 침몰 사고의 경우 기존의 VDR 기록 데이터로는 사고 원인 분석에 한계가 있다. 따라서, 본 연구에서는 기존의 VDR에 기록되어져야 하는 IMO 권고 기록 데이터 이외에 내항성능 평가에 필요한 선체 상하가속도를 VDR의 추가 기록 데이터로 채택하여 선박의 항해위험도를 평가함으로써 전복 침몰 사고에 대한 정량적인 원인 분석에 적용하고자 한다.

• 융합정보논문지
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• 제9권12호
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• pp.157-165
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• 2019

찰스 린드버그는 1927년 뉴욕에서 출발한 후 약 20시간 동안 대서양 횡단 비행 중 피로로 인해 잠든 동안 항공기가 통제되지 않는 상황을 경험하였다. NTSB(National Transportation Safety Board) 보고서에 따르면 매년 약 40건의 준사고가 피로와 관련되어 있는 것을 알 수 있다. 수면 손실은 알코올과 비슷한 효과를 유발할 수 있으며, NTSB에서 꾸준히 조사 중에 있는 부분이기도 하다. 피로는 특히 이륙 및 착륙 시 위협 및 오류 관리에 영향을 줄 수 있다. 본 연구에서는, NTSB가 일반적인 요인인 피로를 분석한 주요사고의 위협과 오류를 식별하고 피로의 심각성을 이해하고자 한다.

• 한국항공운항학회지
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• 제27권2호
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• pp.16-25
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• 2019

While various efforts are being made to ensure aviation safety, air accident rate induced by pilot human factors is still high worldwide. In particular, among pilot human factors, it would be the most important issue for pilots to anticipate and recognize flight environmental factors beyond their control and to make a positive decision making(ADM). In the Republic of Korea Air Force(ROKAF), there were many dizzying experiences induced by bird strike incidents and developed into dangerous moments such as damage to the aircraft and pilots' increased mental stress. It is a matter of serious concern in terms of safety management and human factors to dismiss bird strike incidents as inevitable misfortune due to environmental factors. In 2018, the ROKAF Aviation Safety Agency(ASA) conducted an experimental study to enhance pilots' ADM competence that can anticipate and avoid a bird strike. As the way of the study, 'Bird Strike Preventing Information' had been written and distributed every week by the ASA to flight units in the ROKAF during the period of the study. Through enhanced pilots' perceptual ADM competence, there was a noticeable number of reduction in bird strike incident compared to previous years of the experimental study.

• 한국산업융합학회 논문집
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• 제24권4_2호
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• pp.491-499
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• 2021

Batteries are widely used for energy storage, such as ESS(Energy Storage System), electric vehicles, electric aircraft, and electric powered ships. Among them, a submarine uses a high power battery for an energy storage. When the battery of a submarine is discharged, a diesel generator generates AC power, and then AC/DC power converter change AC power to DC power for charging the battery. Therefore, in order to lower the current capacity of the diesel generator, it is necessary to use an AC/DC converter with a high input power factor. And, a power converter with a large power capacity must have high stability because it can lead to a major accident when a failure occurs. However, the control algorithm using the traditional PI controller is difficult to satisfy stability and dynamic characteristics. In this paper, we design the high power AC/DC converter with high input power factor for battery charging systems. And, we propose a stable control algorithm. The validity of the proposed method is verified through simulation and experiments.

• 산업경영시스템학회지
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• 제44권4호
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• pp.106-112
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• 2021

In the early 1960s, US Air Force lost missile launch bases during ICBM development by a defect in the missile design and operation plan. U.S. DoD realized the limitation of the existing accident prevention method. Therefore, the weapon development required system safety activity, and procurement projects of U.S. DoD applied MIL-STD-882(System Safety). Development projects of U.S. DoD more emphasized the importance of system safety after the space shuttle Challenger exploded in 1986. Currently, Airworthiness certification for military aircraft uses system safety to minimize accidents. The domestic defense aviation R&D projects also use the system safety for the airworthiness certification. However, non-aviation weapon R&D projects rarely applied system safety. This paper presents a system safety application method for domestic weapon R&D projects by studying the U.S. military standards/organizations and domestic defense aviation projects.

• 한국항공운항학회지
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• 제31권2호
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• pp.18-24
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• 2023

According to the results of a survey by Boeing, LOC-I (Loss of Control in Flight) was the highest in the number of deaths by fatality accident category in the past 10 years from 2012 to 2021, and the number of deaths worldwide due to LOC-I accidents was 757. It turned out to be the biggest cause of aircraft fatalities, with a figure close to twice the sum of UNK (Unknown or Undetermined), which is the 2nd place, and CFIT (Controlled Flight Into or Toward Terrain), which is the 3rd place. This study set six scenarios related to spatial disorientation that may occur during sensory-dependent flight targeting student pilots and instructor pilots at domestic designated specialized educational institutions using flight simulation training equipment, and in each scenario, the pilot's. The need for SDRT (Spatial Disorientation Recovery Training) is verified by analyzing the flight experience and recovery ability by qualification, and SDRT is repeatedly performed to verify and present the training cycle and time.

• 대한교통학회지
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• 제22권6호
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• pp.17-33
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• 2004

1970년대부터 시작된 우리나라의 경제개발계획은 성장위주의 급격한 산업화의 영향으로 각종교통수단의 안전은 물론 항공안전관리체계가 정착되지 않은 채 지속되어 2000년 초까지 발생된 항공기 사고에 의한 인적 물적 피해는 물론 사회적으로 막대한 비용을 부담 하고 있다. 특히, 발생된 항공기의 사고요인으로는 항공종사자의 인적요인에 의한 사고가 대부분으로 이를 사전 발견하고 예방할 수 있다면 항공기의 사고율은 대폭 감소시킬 수 있을 것이다. 따라서, 민간항공안전체계의 제도적인 개선대안을 도출하고자 항공안전관리체계를 3단계인 사전적인 예방체계, 사고발생시의 처리체계, 사고 후 수습체계로 구분하여 항공안전 체계의 개선을 위한 단계별 개선대안을 발굴 제시하였다. 발견된 항공안전의 위해 요인들로서는 관리기준과 규칙의 부재, 무관심과 준법정신의 결여 등이 주 요인들로서 이를 개선하기 위해서는 항공안전 체계의 제도적인 정착이 선행되어야 하고, 정부와 항공업계도 항공안전을 위한 위해요인들을 발굴하고 준법정신과 안전을 최우선시하는 마음의 자세가 모든 종사원들에게 확산되도록 유인책을 제공하여야 한다.