Maintenance optimization for systems with dependent competing risks using a copula function

• Autorzy: Guo Ch. , Wang W. , Guo B. , Peng R.

Warianty tytułu

PL

Optymalizacja eksploatacji dla systemów z zależnymi zagrożeniami konkurującymi przy wykorzystaniu funkcji kopuły

• Języki publikacji: EN

Abstrakty

EN

This paper develops a joint copula reliability model for systems subjected to dependent competing risks caused by two degradation processes and random shocks. The two degradation processes follow gamma processes and the random shocks follow a non-homogeneous Poisson process (NHPP). Their interdependence relationship is modeled by a copula function, which is determined by a two-stage method based on simulated data. It is shown that the proposed model can provide more precise results than the model without considering the dependent relationship. Through the proposed reliability model, two maintenance models are studied and compared. It is found that the inspection cost has significant effects on the choosing of maintenance policy.

PL

W niniejszej pracy opracowano wspólny model niezawodności z użyciem kopuły dla systemów poddawanych zależnym zagrożeniom konkurującym powodowanym przez dwa procesy degradacji i zaburzenia losowe. Owe dwa procesy degradacji reprezentują typ procesu gamma, podczas gdy zaburzenia losowe są typem niejednorodnego procesu Poissona (non-homogeneous Poisson process - NHPP). Ich związek wzajemnej zależności modelowany jest przy użyciu funkcji kopuły, która jest wyznaczana na podstawie dwuetapowej metody opartej o dane symulowane. Wykazano, iż proponowany model może zapewnić bardziej precyzyjne wyniki niż model, w którym nie ujęto związku zależności. W oparciu o proponowany model niezawodności, badane i porównywane są dwa modele eksploatacji. Stwierdzono, iż koszt przeglądu ma duży wpływ na wybór polityki eksploatacyjnej.

Słowa kluczowe

EN

dependent competing risks; copula function; simulated data; degradation; random shocks; maintenance optimization

PL

zależne ryzyka konkurujące; funkcja kopuły; dane symulowane; degradacja; zaburzenia losowe; optymalizacja eksploatacji

• Wydawca: Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne
• Czasopismo: Eksploatacja i Niezawodność
• Rocznik: 2013
• Tom: Vol. 15, no. 1
• Strony: 9--17
• Opis fizyczny: Bibliogr. 34 poz.

Twórcy

autor

Guo Ch.

autor

Wang W.

autor

Guo B.

autor

Peng R.

• Department of System Engineering College of Information Systems and Management National University of Defense Technology Changsha, Hunan 410073, China,

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