항공우주시스템공학회지 (Journal of Aerospace System Engineering)

  • 제17권4호
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  • Pages.126-132
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  • 2023
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  • 1976-6300(pISSN)
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  • 2508-7150(eISSN)
항공우주시스템공학회 (The Society for Aerospace System Engineering)
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전륜 조향용 전기식 작동기 피로수명 평가

Evaluation of Fatigue Life of Electro-Mechanical Actuator for Front Wheel Steering

  • 투고 : 2023.05.21
  • 심사 : 2023.08.03
  • 발행 : 2023.08.31
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초록

최근 항공분야에서는 온실가스 배출 저감을 위한 친환경 기술이 강조되면서 전기를 주동력원으로 기계적인 직진, 회전 운동을 제어하는 전기식 작동기의 다양한 연구가 진행되고 있다. 본 연구에서는 단일통로 항공기 전륜조향용 전기식 작동기의 피로수명을 평가하였다. 구조해석을 통해 작동기의 취약부위들을 선정하여 이들에 대한 단위하중 응력표를 구축하였고, 각 하중 프로파일에 대한 대표응력을 계산하였다. 또한 낙수계수법으로 대표응력 그룹의 개별 프로파일을 추출하고, 이를 소재의 S-N 선도에 적용하여 개별 프로파일에 대한 손상을 계산하였다. 최종적으로 손상누적법칙으로 취약 부위들에서의 총 손상을 산출하였고, 단일통로 항공기 전륜조향용 전기식 작동기의 취약 부위들에 대한 피로수명을 평가하였다.

Recently, the consideration of eco-friendly technology to reduce greenhouse gas is being emphasized in the aviation field. Various studies for applying electro-mechanical actuators that control mechanical linear and rotational movements using electricity as the primary power source are in progress. In this study, the fatigue analysis of the electro-mechanical actuator for the front wheel steering of a single aisle aircraft was carried out. A unit load stress table was constructed for the vulnerable part selected through structural analysis, and the representative stress for each load profile was calculated using the unit load stress table constructed for the vulnerable part. Then, individual profiles of representative stress group were extracted from continuous load profiles by applying the rainflow counting method. The damage of each profile was calculated by applying the S-N diagram. Finally, the total damage in the vulnerable parts was calculated by the linear cumulative damage law, and the fatigue life of the electro-mechanical actuator for the front wheel steering of a single aisle aircraft was evaluated.

키워드

과제정보

본 연구는 2023년도 산업통상자원부 및 산업기술평가관리원(KEIT)의 연구비 지원으로 수행되었습니다(과제번호 20015920, 단일통로항공기 전륜 조향작동용 고신뢰도 전기식 작동기 개발). 또한 2023년도 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임(No.2022R1F1A1069025, 2022R1A6A1A03056784).

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