Abstract
항공기의 연료량 지시계는 비행동안 잔여 연료량을 시현해주는 장치로 비행 중에는 정상적으로 성능을 발휘해야 한다. 한국형 기동헬기 연료량 지시계는 비행 중에 결함코드 "8888"을 시현하여 잔여 연료량을 확인하지 못해 비행안전에 영향을 끼쳤으며 고장탐구과정에서 개발과정 시 미흡하게 설계된 EMI/EMC 성능을 확인하였다. 본 논문에서는 비행 중 결함코드를 시현하는 원인인 전자기 외란에 의한 전원 불안정 및 CAN 통신 오류를 확인하고 이와 연관된 연료시스템의 개선 및 설계 적합성을 입증하였다. Aircraft fuel indicator is a device to indicate the amount of fuel remained during flight, where accurate and consistent operation of the indicator should be maintained. Previously the Korean Utility Helicopter fuel indicator sporadically displayed abnormal sign by "8888" during flight, jeopardizing flight safety. Inappropriate EMI/EMC performance was detected during trouble shooting process. The cause of the abnormal display was found to be resulted from unstable power induced by electro-magnetic disturbance and CAN communication error. The aircraft fuel indicator design was improved and the design compatibility was verified to avoid abnormal display.
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