Flight Test Applications of an Improved Operational Load Monitoring Device

다국어 초록 (Multilingual Abstract)

This paper introduces a load monitoring device and its flight test applications for military aircraft. The device can digitize and record signals from optical fiber sensors and strain gauges. Some key flight parameters can be simultaneously recorded in the device, which is connected to an aircraft data bus cable. The device was installed on a low-speed aircraft and multiple sensors including fiber optic sensors and strain gauges were surface bonded on certain major structures. A total of 40 flight tests were conducted over 2 years. The recorded signals and parameters were successfully analyzed and reviewed to measure strains and vertical landing speeds and to estimate structural loads for over 200 flight hours. Structural load spectra were also obtained using the developed load monitoring device and compared with military specification and design spectra.

참고문헌 (Reference)

1 고명균, "지상 및 비행 시험을 통한 플랩의 힌지 모멘트 추정" 한국항공우주학회 46 (46): 464-470, 2018

2 박찬익, "광섬유 센서를 사용한 항공기용 하중 모니터링 시스템 개발과 지상시험 적용" 한국항공우주학회 45 (45): 639-646, 2017

3 Negard GR, "The History of Aircraft Structural Integrity Program" Aerospace Structures Information and Analysis Center 1980

4 Park CY, "Structural static tests using Fiber Bragg Grating sensors" 239-242, 2009

5 Ha J-S, "Structural health monitoring of a military aircraft using an analog and fiber optic sensor-based data acquisition system for structural life management" 2017

6 Molent L, "Review of fatigue monitoring of agile military aircraft" 23 (23): 767-785, 2000

7 Molent, L, "Proposed specifi cations for an unifi ed strain and flight parameters based aircraft fatigue usage monitoring system" 1998

8 Anon, "Non-Metallic Optical Strain Gage | OS3200" Micron Optics Inc

9 Anon, "Joint Service Specifi cation Guide"

10 Lopez-Higuera JM, "Fiber optic sensors in structural health monitoring" 29 (29): 587-608, 2011

11 Taylor J, "Design and use of counting accelerometers" Aeronautical Research Council 1954

12 Anon, "Airplane strength and rigidity reliability requirements, Repeated loads and fatigue" Department of Defense 1975

13 Fuentes R, "Aircraft parametric structural load monitoring using Gaussian process regression" 1933-1940, 2014

14 Kim J-H, "Aircraft health and usage monitoring system for in-fl ight strain measurement of a wing structure" 24 : 10-, 2015

15 Anon, "Aircraft Structural Integrity Program" Department of Defense 2016