Abstract

Nonlinear degradation modeling and maintenance policy for a two-stage degradation system based on cumulative damage model

Highlights

  • IntroductionDegradation analysis is a research hotspot for prognostic and health management (PHM), which can be used for estimating failuretime distribution [16], predicting remaining useful life (RUL) distri-

  • Degradation analysis is a research hotspot for prognostic and health management (PHM), which can be used for estimating failuretime distribution [16], predicting remaining useful life (RUL) distri-Eksploatacja i Niezawodnosc – Maintenance and Reliability Vol.18, No 2, 2016Science and Technology bution [3, 23] and exploring preventive maintenance policy [12, 25]

  • Ponchet [17] assumed that change-point of degradation rate cannot be monitored, and he developed two condition-based maintenance optimization models with and without considering the change-point in system degradation process, respectively, the numerical results showed that it can bring considerable benefits if degradation rate changing was considered in maintenance policy

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Summary

Introduction

Degradation analysis is a research hotspot for prognostic and health management (PHM), which can be used for estimating failuretime distribution [16], predicting remaining useful life (RUL) distri-. Ponchet [17] assumed that change-point of degradation rate cannot be monitored, and he developed two condition-based maintenance optimization models with and without considering the change-point in system degradation process, respectively, the numerical results showed that it can bring considerable benefits if degradation rate changing was considered in maintenance policy In these existing studies, the mean degradation rates in the first stage and the second stage were both considered as fixed, and the increased process of degradation level presented linear. In 2011, Fouladirad [6] took into account a system with time-dependent degradation rate after change-point, but the degradation process was assumed to be continuous Gamma process He studied a condition-based maintenance policy with time-dependent alarm thresholds in the second degradation stage.

Two-stage degradation system
Reliability modeling
Nonlinear degradation modeling
Shock damage change
Shock counting change
Maintenance policy
Adaptive maintenance policy
Time-dependent maintenance policy
Evaluation method
The probability of corrective maintenance
Mean time length of a renewal cycle
Numerical example
Influence of change-point distribution
Influence of nonlinear degradation process
Conclusions

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