• Journal of Advanced Marine Engineering and Technology
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• 제37권7호
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• pp.737-742
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• 2013

Recently, unmanned aircrafts for safe measurement in hazardous locations have been developed. In a method of operation of unmanned aircraft vehicles (UAV), there are two methods of manual control and automatic control. Small UAVs are used for low altitude surveillance flights where unknown obstacles can be encountered. Obstacle avoidance is one of the most challenging tasks which the UAV has to perform with high level of accuracy. In this study, we used a laser range finder as an obstacle detector in automatic navigation of unmanned aircraft to patrol the destination automatically. We proposed a system to avoid obstacles automatically by measuring the angle and distance of the obstacle using the laser range finder.

• 한국군사과학기술학회지
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• 제19권5호
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• pp.654-661
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• 2016

An unmanned aircraft refers to an aircraft which carries no human pilot and is operated under remote control or in autonomous operational mode. An unmanned aircraft system consist of a one system which include UAV(s), UAV control station and data link, etc. As the UAVs can perform the dull, dangerous and difficult missions, various kinds of UAVs with different sizes and weights have been developed and operated for both civil and military areas. It is important to develop the airworthiness certification criteria of the UAVs to minimize the risks of fatal impacts on human life and environment and to achieve the equivalent level of safety to the manned aircraft. Analysis of the KAS Part 23 and STANAG 4671 can provide guidelines for the generation of the airworthiness certification criteria for the UAVs in civil application.

• 항공우주시스템공학회지
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• 제9권4호
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• pp.8-15
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• 2015

Unmanned Aircraft System(UAS) is a huge and complicated system that is composed of UAV, ground control system, datalink system, and mission equipments. We have applied system engineering to development of UAS. Configuration management is very important activity for efficient developments. The Configuration management process comprises four distinct disciplines (Configuration identification, Configuration control, Configuration status accounting, and Configuration audit). This paper explains the configuration management system of UAS development project which ADD executes and introduces several examples of these four disciplines.

• 한국항공우주학회지
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• 제32권10호
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• pp.127-133
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• 2004

본 논문은 무인항공기의 자동비행을 위한 이동형 지상제어 시스템 개발에 관한 연구이다. 본 연구에서는 휴대와 이동을 수월하게 하기 위한 이동형 지상제어시스템 (PGCS)을 개발하였다. 일반적으로 지상제어시스템은 항공기가 수행해야할 임무정보를 전송하고, 원활한 조종을 위하여 항공기 위치, 자세, 상태, 항법 정보를 항공기로부터 실시간 수신할 수 있어야 한다. 이동형 지상제어시스템 구성은 노트북 컴퓨터, 지상제어시스템과 항공기간의 통신을 위한 모뎀, 입/출력 보드, 무선조종 수신기 그리고 여러 개의 스위치와 LED 램프로 구성된다. 소형 무인항공기를 이용한 비행시험으로서 본 연구에서 개발한 이동형 지상제어시스템 성능 검증을 수행하였다.

• 항공우주정책ㆍ법학회지
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• 제33권2호
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• pp.367-418
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• 2018

항공에 있어서 안전이 가장 중요한 것처럼 무인항공기 운영에 있어서도 안전이 가장 중요하고 무인항공기 운영자의 법적책임에 있어서도 안전운영책임이 가장 중요하다고 할 수 있다. 본 논문에서는 무인항공기 운영자의 안전운영 책임을 중심으로 무인항공기 운영자가 지게 되는 법적책임 문제를 사고 발생 시 피해를 보상해주는 보험 문제와 함께 심도있게 고찰하였다. 우선 무인항공기 운영자의 법적책임 문제는 가장 기본적인 무인항공기 운영자의 정의, 범위, 자격요건을 살펴보고 규제동향으로 국제민간항공협약, ICAO 부속서와 RPAS Manual, 로마협약 등 주요 국제협약, 항공안전법 등 국내 관련 법률상의 운영자의 책임규정을 고찰하였다. ICAO에서는 무인항공기도 궁극적으로는 유인항공기와 동등한 수준의 기술상 및 운항상의 안전성을 확보할 것을 요구하고 있으며 무인항공기 운영의 대원칙으로 사람, 재산 및 다른 항공기에 대한 위험을 최소화 하는 방법으로 운영 되어야 한다고 규정하고 있다. 이와 관련 무인항공기 사고의 경우는 대부분이 지상에 추락하여 제3자의 인명이나 재산에 피해를 입히는 사고가 대부분인 점을 감안 관련 국제협약인 로마 협약상의 운영자의 책임과 국내 상법 항공운송편의 제3자 책임 관련 규정을 중점적으로 살펴보았으며 사고 발생에 따른 배상책임 문제도 살펴보았다. 로마협약과 관련하여서는 1952년 로마협약이 운영자의 책임을 상세히 규정하고 있다. 배상책임과 관련하여서는 아직 발효는 되지 않았지만 EU 일부국가에서는 2009년 로마협약상의 책임한도액을 따르고 있는 점이 특징이다. 아직 우리나라는 어떠한 로마협약에도 가입하지 않고 있으나 상법 항공운송편은 배상책임에 있어 1978년 로마협약을 모델로 하고 있다. 이들 이외에 무인항공기 운영에 따르는 관련 법적책임으로 가장 많이 문제가 되고 있는 보안관련 책임과 사생활 침해에 대한 책임도 살펴보았다. 보험과 관련하여서는 전 세계적으로 항공보험의 가입 의무화 경향과 이에 따른 주요 각국의 규제현황을 살펴보고 무인항공기에의 적용 가능성을 살펴보았다. 또한 현행 국내 항공사업법상의 보험가입 의무화 조항과 초경량 비행장치 보험 규정과 문제점을 살펴보았다. 요컨대 무인항공기 운영자는 무인항공기를 인명이나 재산 또는 다른 항공기에 위험을 주지 않도록 안전하게 운영할 법적책임이 있으며 사고 발생 시는 적절한 보상책임이 있다고 할 것이며 이를 위한 보험제도 등 법제도적 장치가 마련되어야 한다.

• 산업경영시스템학회지
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• 제45권1호
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• pp.10-19
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• 2022

Recently, the Defense Advanced Research Projects Agency(DARPA) in the United States is studying a new concept of war called Mosaic Warfare, and MUM-T(Manned-Unmanned Teaming) through the division of missions between expensive manned and inexpensive unmanned aircraft is at the center. This study began with the aim of deriving the priority of autonomous functions according to the role of unmanned aerial vehicles in the present and present collaboration that is emerging along with the concept of mosaic warfare. The autonomous function of unmanned aerial vehicles between the presence and absence collaboration may vary in priority depending on the tactical operation of unmanned aerial vehicles, such as air-to-air, air-to-ground, and surveillance and reconnaissance. In this paper, ACE (Air Combat Evaluation), Skyborg, and Longshot, which are recently studied by DARPA, derive the priority of autonomous functions according to air-to-air collaboration, and use AHP analysis. The results of this study are meaningful in that it is possible to recognize the priorities of autonomous functions necessary for unmanned aircraft in order to develop unmanned aerial vehicles according to the priority of autonomous functions and to construct a roadmap for technology implementation. Furthermore, it is believed that the mass production and utilization of unmanned air vehicles will increase if one unmanned air vehicle platform with only essential functions necessary for air-to-air, air-to-air, and surveillance is developed and autonomous functions are expanded in the form of modules according to the tactical operation concept.

• International Journal of Aerospace System Engineering
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• 제5권2호
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• pp.1-7
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• 2018

This study examines the history of Korean aviation industry and presents the investment strategy based on the evidence and the 4th industrial revolution. Looking at the evolution of the Korean aviation industry and its technological development will be a great help to support industrial and technological innovation in the future. The modern aviation industry is divided into stages of development, focusing on maintenance of equipment introduced in advanced countries, localization through license assembly, production of products based on technology, and international joint development. The development of aeronautics technology has been progressing towards a general improvement of economic efficiency, aircraft safety efficiency through environmental-friendliness, unmanned operation, and downsizing. The Korea Aerospace Research Institute has secured key technologies through development of several aircrafts such as Experimental Aircraft Kachi, EXPO Unmanned Airship, Twin-engine Composite Aircraft, Canard Aircraft, Multi-Purpose Stratosphere unmanned-airship, Medium Aerostats, Smart UAV, Surion, EAV-2H, KC-100, and OPV. The development strategy is discussed at the level of the evidence-based investment strategy that is currently being discussed, and so the investment priorities in aircraft is high. Current drone usage and development direction are not only producing parts using 3D printer, but also autonomous flight, communication (IoT, 5G), information processing (big data, machine learning). Therefore, the aviation industry is expected to lead the fourth industrial revolution.

• 공학교육연구
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• 제17권5호
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• pp.17-22
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• 2014

Unmanned aerial vehicles (UAVs) that have been recently commercialized can largely be divided into fixed-wing aircraft and rotor aircraft by their styles and flight characteristics. Although the fixed-wing aircraft represents higher power efficiency, higher speed, longer flight distance and larger loading weight than the rotor aircraft, they have a disadvantage of requiring a space for take-off and landing. On the other hand, the rotor aircraft can implement vertical take-off and landing (VTOL) and represents various flight modes (hovering, steep bank turns and low-speed flights). But they require both precision take-off control and attitude control. In this study, we used a quad-tilt rotor UAV to combine advantages in both the fixed-wing aircraft and the rotor aircraft. The quad-tilt rotor (QTR) system was designed and constructed by adding a tilt device with a servo motor to a general quad-rotor vehicle.

• 한국항공운항학회지
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• 제28권4호
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• pp.55-62
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• 2020

Special airworthiness certificates can be issued if the aircraft does not meet the airworthiness standards, but it is deemed that it can be operated safely by partially limiting the scope of operation and flight performance. Currently, Korea is subject to experimental special certification for UAS(Unmanned Aircraft Systems) exceeding 150 kg of its own weight, but detailed guidelines need to be prepared on how to prove that they can be operated safely in a limited range. Recently, Korea Airworthiness Standard(KAS) Part 21 has been revised to reflect this, but it needs to be supplemented. In this study, through an understanding and analysis of the FAA's procedure of expeirmental special airworthiness certifications for UAS, we would like to suggest what we should consider when developing relevant guidelines in our country.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 봄 학술논문 발표대회
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• pp.172-173
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• 2021

In recent, unmanned Aircraft Systems (UAS) have been widely used for various purposes, such as safety inspection, facility condition inspection, progress monitoring, in the architecture engineering, and construction (AEC) industry. This technology can provide visual assets regarding the conditions of construction jobsites as well as constructed facilities during flying over the point of interests. With the significant interests in this advancement, the recent studies have presented how the UAS can be applied fro different types of facilities (e.g., buildings, power genereation systems, roads, or bridges) to inspect the current conditions of them for safe operations as well as public's safety. This study reviewed the receent studies to document their scientific findings and practical contributions, as well as provided the overview of further implications for future studies.