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

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Design Improvement for Abnormal Display of Fuel Indicator Mounted on the Korean Utility Helicopter

한국형 기동헬기 연료량 지시계 이상시현 현상 설계개선

  • Received : 2014.01.20
  • Accepted : 2014.06.25
  • Published : 2014.08.01
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Abstract

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.

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.

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References

  1. HELICOPTER, UTILITY, Korea Defence Standard KDC 1450-T4001, 2012, pp.102
  2. BOSCH CAN Specification, 1991, pp.28
  3. Qualification Test Report for KUH Fuel Quantity Measurement System, 2012, pp.5
  4. EMI/EMC Test Report for KUH Fuel Quantity Measurement System, 2012, pp.24
  5. Requirement for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment, MIL-STD-461F, Dec. 2007
  6. EMI/EMC Test Report, 2013, pp.5