Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Risk Assessment of a Drone Under the Gust and its Precise Flight Simulation

드론의 외풍 환경 비행 안전성 평가 및 정밀 시뮬레이션

  • Lee, DongYeol (Department of Aerospace Engineering, Seoul National University) ;
  • Park, SunHoo (Department of Aerospace Engineering, Seoul National University) ;
  • Shin, SangJoon (Department of Aerospace Engineering, Seoul National University)
  • Received : 2021.11.15
  • Accepted : 2022.02.24
  • Published : 2022.03.01
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Abstract

The operation and transportation environment for an unmanned aerial vehicle will be completely different from those for the conventional air and ground transportation. The requirement for a traffic management system for its safe operation has been emerging. Accordingly, investigation is being conducted to analyze the danger that unmanned aerial vehicle may encounter during the flight and to provide the countermeasure by the simulation. When the drones operate in an urban environment, they may be affected by the wind around the building. Thus it is essential to predict the influence of the gust and analyze the resulting risk. In this paper, a method for evaluating the safety for a flight mission under the gust is suggested. By using the precise 6-degree-of-freedom flight simulation that is capable of simulating the gust condition, possible deviation from the pre-planned flight path in terms of the attitude orientation will be predicted. A method of quantifying the probability of the flight mission failure will also be presented.

드론의 운항 방식 및 교통환경은 기존의 항공교통이나 지상교통과는 상이하다. 드론의 안전 운항을 위한 교통 관리 체계 정립의 필요성이 대두되고 있다. 이에 따라 드론이 비행 중에 조우할 수 있는 위험 상황에 대하여 시뮬레이션에 의거하여 분석하고 대책을 수립하는 연구가 활발히 진행되고 있다. 특히 드론이 도심 환경에서 운항할 때 건물 사이로 발생하는 외풍에 영향을 받을 수 있으며, 이러한 외풍의 영향성을 예측하고 위험도를 분석하는 것이 필수적이다. 본 논문에서는 외풍 환경에서 비행 임무의 안전도를 평가하는 방법을 제시하였다. 외풍 조건을 입력할 수 있는 정밀 6자유도 비행 시뮬레이션을 구현하여 비행 임무 수행 중 외풍으로 인한 경로의 이탈, 자세각의 변화 등 그 영향성을 예측하였다. 비행 임무 실패 확률에 대해 정량화하는 방법을 제시하였다.

Keywords

Acknowledgement

본 연구는 국토교통부/국토교통과학기술진흥원 무인 항공기 안전지원 기술개발사업의 연구비 지원(과제번호 21USTR-B127901-05)에 의해 수행되었습니다.

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