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

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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DVI cable Improvement for Preventing MFD Abnormal Display of a Rotary-wing Aircraft

회전익 항공기 다기능시현기의 이상시현을 방지하기 위한 DVI 케이블 개선

  • Received : 2018.06.02
  • Accepted : 2018.08.27
  • Published : 2018.09.01
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Abstract

Multi-Function Display (MFD) of Korean Utility Helicopter (KUH) displays image information(navigation, flight, topographical and maintenance information) delivered from Mission Computer (MC) during flight operation. The abnormal display of MFD such as flickering phenomenon was identified in the system development. It was solved by improving the shielding performance of the DVI cable and changing the DVI cable installation path at the first mass production. However, it was occurred again when the aircraft was operated for one or two years after delivery. It was also identified in the evaluation process of the derivative helicopters. Therefore, a comprehensive review of the aircraft system level has been performed to solve the problem of MFD malfunction at first and then a design improvement plan was derived by improving the DVI cable. In this paper, the causes of MFD anomalies are analyzed and also the process of design improvement are summarized. The validity of the improvement has been verified through the DVI cable assembly comparison test, SIL/ground/flight test.

한국형 기동헬기(KUH)의 다기능시현기(MFD)는 항공기 운용 중 임무컴퓨터(MC)로부터 영상정보(항법, 비행, 생존, 지형 및 정비 관련 정보)를 입력받아 시현한다. 체계개발 단계에서 식별된 MFD 이상시현(화면 깜박임 현상 등)은 항공기 초도양산 과정에서 DVI 케이블 차폐 성능 개선과 DVI 케이블 장착 경로 변경을 통하여 해소하였다. 항공기 납품 후 1~2년 정도 경과하였을 때 MFD 이상시현이 다시 발생하였고, 파생형헬기 시험평가 과정에서도 식별되었다. 이러한 MFD 이상시현의 해결을 위하여 항공기 체계 단위의 종합 검토를 수행하였고, DVI 케이블의 개선을 통한 설계 개선방안을 도출하였다. 본 논문에서는 MFD 이상시현의 발생원인을 분석하였고, 설계 개선방안 검토과정을 정리하였다. 그리고 설계 개선사항에 대한 타당성을 DVI 케이블 조립체 비교시험, SIL/지상/비행시험 결과를 바탕으로 입증하였다.

Keywords

References

  1. 88KHZM7146, "Operational Manual for KUH MEP", Agency for Defense Development, Sep. 2012.
  2. Kim, S. W., Go, E. K., and Lee, B. H., "Design to Integrated Display and Caution Function for KHP", Journal of the Korean Society for Aeronautical and Space Science, Vol. 45, No.6, Jun. 2017, pp. 481-489. https://doi.org/10.5139/JKSAS.2017.45.6.481
  3. MIL-HDBK-83575, "General handbook for space vehicle wiring harness design and testing", Department of Defense, Jun. 1998.
  4. SAE-AS-50881, "Wiring Aerospace Vehicle", Society of Automotive Engineers Aerospace Standard, May. 2015.
  5. Kim, Y. M., Chang, J. J., Jun, B. K., Kim, C. Y., and Kim, T. H., "A Study on Improvement about abnormal display of Multi Function Display for KUH", Journal of the Korean Society for Aeronautical and Space Science, Vol. 42, No.4, Apr. 2014, pp. 344-350. https://doi.org/10.5139/JKSAS.2014.42.4.344
  6. 24463/05099X-8(LD), Four Pair, 100-Ohm, DVI cable, Tensolite.
  7. GSC-01-84895-00, DVI-24 AWG, Gore
  8. A88PS0002, "Manufacture and Installation of Wiring Harness," Defense Acquisition Program Administration (DAPA), Mar. 2013.
  9. "DVI Test and Measurement Guide," Digital Display Working Group(DDWG), Apr 1999.