Mathematical modelling of military technical equipment degradation (2023)

Supervisors: Zdenek Vintr

Keywords: lectronic element, light-emitting diode (LED), military vehicle, accelerated test, Wiener process, statistical regression, remaining useful life, first hitting time.

The work proposes a procedure for mathematical modelling of degradation based on the use of the results of accelerated reliability tests. The proposed procedure enables continuous monitoring of the degradation level and effective prediction of the mean operating time to failure of military equipment elements under given operating conditions and environment. Similarly, the proposed method also allows prediction of the residual useful life of a given element. The practical applicability of the proposed methods and procedures was experimentally verified for power LEDs used in military equipment.

More information on Hoangs work:

• HOANG, A.D., VINTR, Z., VALIŠ, D. and MAZURKIEWICZ, D. An approach in determining the critical level of degradation based on results of accelerated test. Eksploatacja i Niezawodnosc, 2022, 24(2), 330-337. doi:10.17531/ein.2022.2.14. https://ein.org.pl/pdf-158432-84725?filename=An%20approach%20in.pdf
• VINTR, Z., HOANG, A.D. Methodology for Accelerated Tests of Electronic Elements Based on Multifactor Stress. In: Leva, M. C., E. Patelli, L. Podofillini, and S. Wilson. Proceedings of the 32th European Safety and Reliability Conference (ESREL 2022). Singapore: Research Publishing, 2022, pp. 1275-1282. doi:10.3850/978-981-18-5183-4_R22-10-270-cd. https://www.rpsonline.com.sg/proceedings/esrel2022/pdf/R22-10-270.pdf
• HOANG, A.D., VINTR, Z., VALIŠ, D., LA, Q.T. The Effect of on/off Cycling on the Lifetime of a Light-Emitting Diode Used in a Military Vehicle Design. In: Transport Means 2022 - Proceedings of the 26th International Scientific Conference. Part I. Kaunas: Kauno Technologijos Universitetas, 2022, roč. 2022, č. 26, pp. 17-21. doi:10.5755/e01.2351-7034.2022.P1. https://transportmeans.ktu.edu/wp-content/uploads/sites/307/2023/02/Transport-Means-2022-Part-I.pdf