System Reliability Modeling in Competitive Failure Considering Zoned Shock Effect

doi:10.16182/j.issn1004731x.joss.20-0009

Abstract

Abstract: Shocks have certain effects on system reliability, and how to quantify the degree of shock loads becomes the key of system reliability analysis. The reliability modeling problem of system suffered from different shock strength is researched based on degradation process competing with sudden failure. Shock process is descripted by extreme shock and two types of degradation processes are descripted by Wiener process under the condition of shifting failure threshold. Aiming at different intensity shocks on the system, the different shock load suffered by zoned shock effect is partitioned, the distribution function of the two types of failure processes is established, and the reliability model of the competing failures of the system is proposed. The parameter simulation of the Sandia micro-engine system is carried out to verify the correctness and effectiveness of the reliability evaluation model, which can validly improves the accuracy of system competitive failure reliability.

Key words: sudden failure hard degradation, shifting threshold, competitive failure, zoned shock effect

CLC Number:

Hu Qiguo, Gao Zhan. System Reliability Modeling in Competitive Failure Considering Zoned Shock Effect[J]. Journal of System Simulation, 2021, 33(5): 1070-1077.

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