• Title, Summary, Keyword: 비행

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Establishment of Flight Simulation Environment for Evaluation of Helicopter Flying Quality (헬리콥터 비행성 평가를 위한 모의비행시험 환경의 구현)

  • Han, Dong-Ju;Lee, Sang-Haeng
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.35 no.9
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    • pp.783-791
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    • 2007
  • For an access to specified helicopter simulator qualification's level C or FTD(Flight Training Device) level 5 of FAA(Federal Aviation Administration) AC(Advisory Circular) 120-63, the mathematical model of a single rotor helicopter flight dynamics is investigated. From the rotorcraft simulation model validated by evaluation of its flight performance, the feasibility of the flight dynamic model that is selected for its effectiveness has been proved. Thereby the simulation environment for evaluation of helicopter flying quality is established with the development of FTD for training and testing the flight performance.

Design of Surveillance Location-based UAV Motor Primitive Structure (감시 위치 기반의 UAV 모터프리미티브의 구조 설계)

  • Kwak, Jeonghoon;Sung, Yunsick
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.1320-1321
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    • 2015
  • 무인항공기(Unmanned Aerial Vehicle, UAV)를 활용하여 넓은 범위를 감시하기 위해서 조종자가 반복적으로 같은 경로를 따라서 UAV를 비행시키는 것은 관리 및 운영에 필요한 비용과 시간 문제가 발생한다. UAV로 넓은 지역을 감시하기 위해서는 UAV의 자율 비행 연구가 필요하다. 전통적인 접근 방법은 GPS를 기반으로 이동할 위치를 연속적으로 설정해서 비행 경로를 설정한다. GPS 기반의 경로 설정은 비행 경로에 장애물이 없을 때 적합하다. 장애물을 고려한 비행을 위해서는 모터프리미티브 기반의 비행 기법이 필요하다. 이 논문에서는 UAV를 자율 비행시키기 위한 모터프리미티브의 구조를 제안한다. UAV의 비행 경로를 설정할 때 비행할 위치를 직접 설정하지 않고 감시할 위치를 설정해서 모터프리미티브를 정의하는 기법을 소개한다. 이와 같은 방법은 UAV가 감시할 위치가 사전에 정의될 때 조종사가 UAV의 경로를 쉽게 설정할 수 있다.

Aerodynamic analysis of disc type flying-object and flying-wing (원반형 비행체와 전익기의 공력특성 분석)

  • Lee, Yeong-Jun;An, Hyeon-Jin;Kim, Byeong-Su
    • Proceeding of EDISON Challenge
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    • pp.550-555
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    • 2014
  • 전익기는 전쟁 중 등장해 활약했다는 점과 그 독특한 형태로 유명세를 타기 시작한 비행체의 한 종류이다. 공기역학적으로 동일한 속도로 비행할 때 일반적인 항공기와 비교해서 적은 동력으로 더 멀리 날수 있는 전익기의 특성과 그 발전방향을 보았을 때 동체의 익면적이 넓어 생기는 특성을 극대화 시키면서 더욱 독특한 형태의 비행체로 나타나는 모습이 원반형 비행체이다. 본 연구는 EDISON Simulation을 활용한 두 비행체의 공력특성 비교를 통해 실제로 원반형 비행체가 많이 쓰이지 않는 이유와 그 장단점에 대한 데이터를 확보했으며 특히 원반형 비행체의 경우 Cockpit 유무와 그 크기에 따라 실속각이 커지는 것을 확인하였다.

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A Longitudinal Study of Bibliotherapy with Juvenile Delinquents (비행청소년의 독서경험에 관한 종단연구)

  • Ko, Jung-won
    • Proceedings of the Korean Society for Information Management Conference
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    • pp.59-66
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    • 2014
  • 본 연구는 비행청소년들이 중학생 시절 경험했던 독서활동과 탈비행과의 관련성을 파악하고자 내러티브 탐구를 실시하였다. 청소년들의 탈비행에 미치는 독서활동의 영향을 밝히려는 본 연구의 목적에 따라 실시한 종단연구에 참여한 탈비행청소년은 5명이며, 연구기간은 8년이다. 연구자는 연구참여자들과 독서활동에 대한 탈비행과정을 자유로운 질문으로 면담일지와 내러티브 텍스트를 작성하여 다음과 같은 결과를 얻었다. 연구참여자로 참가한 비행청소년들은 독서활동을 통하여 과거의 상처를 치료하고 현재의 자신과 타인을 이해하게 되어 건강한 성인으로 성숙해 가고 있다. 비행청소년의 탈비행 지속성은 연구자와 연구참여자 사이의 신뢰와 유대감이 선결조건임이 확인되었다.

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Study on Integrated-Flight Simulation Method Using CFT Imagery (탑재비행시험 영상을 적용한 통합비행 시뮬레이션 기법 연구)

  • Jeong, Dong Gil;Yun, Hyo Seok;Park, Jin Hyen
    • Journal of the Korea Society for Simulation
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    • v.27 no.1
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    • pp.111-117
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    • 2018
  • It is indispensable for a missile to track a target under the flight condition since the tracking capability affects the system performance considerably. The best way to verify the tracker's performance is flight test while it costs too much. Consequently, captive flight test or CFT has an important role in the development of a missile system. CFT, however, cannot simulate missile dynamics and is an offline and open-loop test. In this paper, we propose a new integrated-flight simulation(IFS) method using CFT imagery to overcome the limitation of synthetic image-based IFS method. This method increases the utilization of CFT's outputs and compensates the reality of imagery which lacks in the synthetic image-based IFS. Using this method make it possible to verify the system capability in various simulation modes.

Search of Gender-Specific Theory through Empirical Testing of Factors of Girls' Delinquency based on Feministic Perspectives (페미니스트 관점에 근거한 소녀비행 요인의 검증을 통한 성-특성적 이론의 모색)

  • Kim, Ji-Youn;Jo, Hyun-Bin
    • The Journal of the Korea Contents Association
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    • v.10 no.1
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    • pp.275-285
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    • 2010
  • This research examines the relation of dissatisfaction about own real conditions, deviant labeling, self-esteem, abuse from parent, victimization and juvenile delinquency(smoking, drinking, run-away, assault, taking away stuffs or money, larceny). The evidence of a strong relation of these factors and girls' delinquency is well known through empirical researches by feminist criminologists. Feminist criminology had attention to the gender-specific factors that could explain girls' delinquency. Most of conventional delinquency theories, such as social bond theory, differential association theory, focused on bad boys' deviant behaviors. These theories has not been designed to apply to girls' troubles. According to the conclusion of the research, there seems to support researches of feministic perspectives.

A Study on the Parameters for Icing Airworthiness Flight Tests of Surion Military Helicopter (수리온 군용헬기의 결빙 감항인증 비행시험을 위한 파라미터 고찰)

  • Hur, Jang-Wook;Kim, Chan-Dong;Jang, Jae-Sang
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.43 no.6
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    • pp.526-532
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    • 2015
  • In order to relieve limitation of flight operation under icing condition and verify its operation in adverse weather condition for Surion, military helicopter developed in Korea, airworthiness certification in icing condition is required. The process of Surion icing certification should be considered by implementation of four methods by step such as CFD analysis, simulated flight tests, artificial icing flight tests, and natural icing flight tests. For Surion icing flight tests, these are required 20~30 sorties and 20~23 hours in artificial icing condition; 20~30 sorties and 20~22 hours in natural icing condition. In addition, to proceed with efficient flight tests, it is necessary to implement artificial icing flight tests in LWC $0.5{\sim}1.0g/m^3;$ natural icing flight tests in less than LWC $0.5g/m^3$.

Centralized routing method of unmanned aerial vehicle using vehicular Ad Hoc networks (차량 네트워크 기반 중앙관리형 무인비행체 경로 유도 시스템)

  • Kim, Ryul;Joo, Yang-Ick
    • Journal of the Korean Society of Marine Engineering
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    • v.40 no.9
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    • pp.830-835
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    • 2016
  • With the relaxation of regulations on unmanned aerial vehicles (UAVs) in the USA, the development of related industries is expected. Hence, it is anticipated that the number the UAVs will reach approximately 600,000 in the USA in 2017. However, automated flights of commercial UAVs are restricted owing to concerns about accidents. To deal with the possibility of collisions, several studies on collision prevention and the routing of UAVs have been conducted. However, these studies do not deal with various situations dynamically or provide efficient solutions. Therefore, we propose a centralized routing method for the UAV that uses vehicular networks. In the proposed scheme, vehicular networks regard UAVs as data packets to be routed. Accordingly, the proposed method reduces UAV processing power required for route searches. In addition, the routing efficiency for UAV flight paths can be improved since congestion can be minimized by using a vehicular network.

A Study on UAV Flight Control System HILS Test Environment (무인항공기 비행제어 HILS 시험환경 연구)

  • Byun, Jinku;Hur, Gi-Bong;Lee, KwangHyun;Suk, Jinyoung
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.44 no.4
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    • pp.316-323
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    • 2016
  • A UAV(Unmanned Aerial Vehicle) flies along pre-programed navigation points(in-flight, take-off, or landing) automatically without pilot input. Even though UAVs fly differently from general piloted aircraft as the pilot controls the aircraft from a ground station through means of a data-link system. Occasionally, the data-link connection can be lost for any number of reasons, in which case, the FLCC(Flight control Computer) must automatically switch to autopilot to continue flying. Hence, the FLCC is a flight-critical component that must be throughly tested and validated. This paper discusses the development of a HILS(Hardware in the Loop Simulation) test environment designed to simulate real flight conditions to verify the FLCC satisfies flying quality requirements and maintains robustness despite any potential malfunctions or emergency situations.

Model-Based Design and Enhancement of Operational Procedure for Guided Missile Flight Test System (유도무기 비행시험 시스템을 위한 모델 기반 운용절차의 설계 및 개선)

  • Park, Woong;Lee, Jae-Chon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.20 no.4
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    • pp.479-488
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    • 2019
  • The flight test operational procedure artifact includes mission planning, execution methods, and safety measures for each step of test progress. As the development of guided missiles has become more advanced and strategic, flight test has become increasingly complex and broadened. Therefore, increased reliability of the flight test operation procedures was required to ensure test safety. Particularly, the design of the flight test operational procedures required verification through M&S to predict and prepare for the uncertainty in a new test. The relevant studies have published the optimal framework development for flight tests and the model-based improvements of flight test processes, but they lacked the specificity to be applied directly to the flight test operational procedures. In addition, the flight test operational procedures, which consist of document bases, have caused problems such as limitations of analysis capabilities, insensitive expressions, and lack of scalability for the behavior and performance analysis of test resources. To improve these problems, this paper proposes how to design operational procedure of guided missile flight test system by applying MBSE(Model-based Systems Engineering). This research has improved reliability by increasing the ability to analyze the behavior and performance of test resources, and increased efficiency with the scalability applicable to multiple flight tests. That can be also used continuously for the guided missile flight tests that will be developed in the future.