A novel reliability model for multi-component systems subject to multiple dependent competing risks with degradation rate acceleration

• Autorzy: Zhang Y. , Ma Y. , Liu L. , Ouyang L.

Identyfikatory

DOI

10.17531/ein.2018.4.9

Warianty tytułu

PL

Nowatorski model niezawodności dla systemów wieloelementowych narażonych na liczne zależne ryzyka konkurujące uwzględniający przyspieszenie tempa degradacji

• Języki publikacji: EN

Abstrakty

EN

The purpose of this paper is to establish a new reliability model of the system subject to multiple dependent competing risks. For a system subject to multiple dependent competing risks, the total degradation consists of natural degradation amount and sudden degradation increments (SDIs) caused by random shocks arriving at the system. Most researchers on this topic only focus on the SDIs. However, the impact of random shocks on degradation rate is ignored. In this paper, a novel reliability model considering degradation rate acceleration (DRA) caused by random shocks is proposed, in which the degradation model is based on the degradation path. The dependence relationship between multiple degradation processes is dealt with by copula method, and the arrival time of shocks is assumed to follow a non-homogeneous Poisson process (NHPP). Finally, the effectiveness of the proposed reliability model is demonstrated by an example of a series system. Moreover, the effect of model parameters is evaluated through sensitivity analysis.

PL

Celem niniejszej pracy było stworzenie nowego modelu niezawodności systemu narażonego na liczne zależne ryzyka konkurujące. W przypadku systemu eksponowanego na wiele zależnych ryzyk konkurujących, na wartość całkowitą degradacji składa się wartość degradacji naturalnej oraz wartość nagłych przyrostów degradacji (sudden degradation increments, SDI) powodowanych przez losowe zaburzenia systemu. Większość badaczy tej tematyki koncentruje się wyłącznie na SDI, ignorując tym samym wpływ zaburzeń losowych na tempo degradacji. W niniejszym artykule zaproponowano nowy model niezawodności uwzględniający przyspieszenie tempa degradacji powodowane zaburzeniami losowymi, w którym model degradacji opiera się na krzywej degradacji. Zależność między mnogimi procesami degradacji rozpatrywano za pomocą metody funkcji kopuły przy założeniu, że czas wystąpienia zaburzenia odpowiada niejednorodnemu procesowi Poissona. Skuteczność proponowanego modelu niezawodności zademonstrowano na przykładzie systemu szeregowego. Ponadto, wykorzystano analizę czułości do oceny wpływu parametrów modelu na niezawodność systemu.

Słowa kluczowe

EN

dependent competing risks; degradation rate acceleration; reliability model; copula method; sensitivity analysis

PL

zależne ryzyka konkurujące; analiza czułości; przyspieszenie tempa degradacji; model niezawodności; metoda funkcji kopuły

• Wydawca: Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne
• Czasopismo: Eksploatacja i Niezawodność
• Rocznik: 2018
• Tom: Vol. 20, no. 4
• Strony: 579--589
• Opis fizyczny: Bibliogr. 32 poz, rys.

Twórcy

autor

Zhang Y.

• School of Economics and Management Nanjing University of Science and Technology No. 200 Xiaolingwei, Xuanwu District, Nanjing, Jiangsu Province, China

autor

Ma Y.

• School of Economics and Management Nanjing University of Science and Technology No. 200 Xiaolingwei, Xuanwu District, Nanjing, Jiangsu Province, China

autor

Liu L.

• School of Economics and Management Nanjing University of Science and Technology No. 200 Xiaolingwei, Xuanwu District, Nanjing, Jiangsu Province, China

autor

Ouyang L.

• College of Economics and Management Nanjing University of Aeronautics and Astronautics No. 29 General Avenue, Jiangning District, Nanjing, Jiangsu Province, China

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