Automation of Aircraft Fatigue Life Estimation

• Autorzy: Gajek Stanisław

Identyfikatory

DOI

10.2478/fas-2022-0007

• Języki publikacji: EN

Abstrakty

EN

The fatigue is an important factor in aircraft operation. A correct estimation of structure fatigue life is crucial for user and payload safety. However, due to high amount of data gathered during a typical recording of load spectra for different types of flights, the overall results become prone to human error. The paper describes development of a software able to perform an automated, in-depth analysis of data recorded with onboard accelerometers. Using the Rainflow Cycle Counting method, it transforms received data points into a Markov matrix. The prepared array is then recalculated into a half-cycle matrix, which can be collapsed into scalar value of fatigue level using the Palmgren-Miner rule. The method was tested with loads recorded during a typical flight conducted according to the Polish NSTS-06 flight scenario and simulated camera mounting fixed to a multirotor.

Słowa kluczowe

EN

Aircraft Fatigue; Rainflow Cycle Counting; Load Spectra; UAV

• Wydawca: Wydawnictwa Naukowe Sieci Badawczej Łukasiewicz - Instytutu Lotnictwa
• Czasopismo: Fatigue of Aircraft Structures
• Rocznik: 2022
• Tom: Iss. 14
• Strony: 83--103
• Opis fizyczny: Bibliogr. 20 poz., rys., tab., wykr., wzory

Twórcy

autor

Gajek Stanisław

• Warsaw University of Technology, Institute of Aeronautics and Applied Mechanics, Nowowiejska 24, 00-665 Warsaw, Poland

• https://orcid.org/0009-0001-1240-0293

Bibliografia

• Bathe, K.-J. (2014). Finite Element Procedures. Klaus-Jürgen Bathe.
• Bernet, A. (2021). Manual for OpenTX 2.2. Introduction - OpenTX Taranis Manual. https://opentx-3.gitbook.io/manual-for-opentx-2-2/
• Blackbox logging internals | Betaflight. (n.d.). Betaflight - Pushing the Limits of UAV Performance | Betaflight. https://betaflight.com/docs/development/Blackbox-Internals
• Drake, F. L., & Rossum, G. V. (2009). Python 3 Reference Manual. CreateSpace Independent Publishing Platform.
• Kensche, C. (2019). Numerical Comparison of Glider Load Spectra. Technical Soaring, 43(4), 40-48.
• Kossira, H., & Reinke, W. (1989). KoSMOS - Ein Lastkollektiv für Leichtflugzeuge. Jahrbuch Der DGLR-Jahrestagung 1989 in Hamburg, 89-128.
• Load Spectra. (2009). In J. Schijve (Ed.), Fatigue of Structures and Materials (pp. 259-293). Springer. https://doi.org/10.1007/978-1-4020-6808-9_9
• Logs-Copter documentation. (n.d.). ArduPilot - Versatile, Trusted, Open. https://ardupilot.org/copter/docs/common-logs.html
• Lomov, S., & Xu, J. (2015). 14 - Modelling high-cycle fatigue of textile composites on the unit cell level. Fatigue of Textile Composites. Woodhead Publishing Series in Composites Science and Engineering, 327-349. https://doi.org/10.1016/B978-1-78242-281-5.00014-6
• Maksimovic, K., Posavljak, S., Maksimovic, M., Vasovic Maksimovic, I., & Balac, M. (2021). Total Fatigue Life Estimation of Aircraft Structural Components Under General Load Spectra. In N. Mitrovic, G. Mladenovic, & A. Mitrovic (Eds.), Experimental and Computational Investigations in Engineering. CNNTech 2020.: Vol. 153. Lecture Notes in Networks and Systems (pp. 394-412). Springer, Cham. https://doi.org/10.1007/978-3-030-58362-0_23
• Matsuichi, M., & Endo, T. (1968). Fatigue of metals subjected to varying stress. Japan Society of Mechanical Engineers.
• Mattetti, M., Molari, G., & Sedoni, E. (2012). Methodology for the realisation of accelerated structural tests on tractors. Biosystems Engineering, 113(3), 266-271. https://doi.org/10.1016/j.biosystemseng.2012.08.008
• Murakami, Y. (2019). 23 - What is fatigue damage? A viewpoint from the observation of a low-cycle fatigue process. Metal Fatigue: Effects of Small Defects and Nonmetallic Inclusions (Second Edition), 643-668. https://doi.org/10.1016/B978-0-12-813876-2.00023-6
• Owczarek, W., & Rodzewicz, M. (2009). Investigations Into Glider Chassis Load Spectrum. Fatigue of Aircraft Structures, 2009(1). https://doi.org/10.2478/v10164-010-0014-x
• Reza Kashyzadeh, K. (2020). A new algorithm for fatigue life assessment of automotive safety components based on the probabilistic approach: The case of the steering knuckle. Engineering Science and Technology, an International Journal, 23(2), 392-404. https://doi.org/10.1016/j.jestch.2019.05.011
• Rodzewicz, M. (2007). Investigation of the Glider Load Spectra. Technical Soaring, 37(1), 2-12.
• Rodzewicz, M., & Przekop, A. (2000). Experimental Investigation of the Load Spectrum and Fatigue Tests of the PW-5 World Class Glider. Technical Soaring, 24(1), 15-19. https://journals.sfu.ca/ts/ts/index.php/ts/article/view/357
• Tavares, S. M. O., & de Castro, P. M. S. T. (2017). An overview of fatigue in aircraft structures. Fatigue & Fracture of Engineering Materials & Structures, 40(10), 1510-1529. https://doi.org/10.1111/ffe.12631
• Thielmann, W. & Franzmeyer, F. K. (1969), Statische und dynamische Festigkeitsuntersuchungen an einem Tragflügel des Segelflugzeuges “Cirrus”. Institut für Flugzeugbau und Leichtbau, TU Braunschweig, IFL-Bericht-Nr 69(2).
• Zhang, L., Jiang, B., Zhang, P., Yan, H., Xu, X., Liu, R., Tang, J., & Ren, C. (2023). Methods for fatigue-life estimation: A review of the current status and future trends. Nanotechnology and Precision Engineering, 6(2), 025001. https://doi.org/10.1063/10.0017255