Reliability Evaluation of Multiple DCFP System subject to Shifting Threshold

Li, Chunping; Hao, Huibing; Xu, Fang; Zhao, Guotao

doi:10.1155/2020/9206239

Cited by 2 publications

(3 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wang et al [21] established a new DCFP model based on age and current state. Li et al [22] proposed a DCFP system subject to different failures shifting threshold. In addition, some reliability assessment and maintenance strategies method for the complex degradation system with DCFP model have also established, such as Peng et al [23], Wang et al [24], Rassoul and Kamyar [25], and Jiang et al [26].…”

Section: Introductionmentioning

confidence: 99%

Reliability Modeling and Evaluation for Complex Systems Subject to New Dependent Competing Failure Process

Hao

2022

Mathematical Problems in Engineering

Self Cite

View full text Add to dashboard Cite

The objective of this study is to construct some system-level reliability models subject to new dependent competing failure process of the soft failure process and hard failure process. In those complex system-level models, the soft failure caused by continuous degradation and sudden degradation increases by random shocks and hard failure due to the same shock process; in addition, the bidirectional effects between natural degradation and random shock are considered in this study; in other words, the random shock can bring additional degradation, and the natural degradation may also impact the shock process. Therefore, the soft failure process and hard failure process are dependent. By using the cumulative shock model and Gaussian stochastic degradation process with line mean value and line standard deviation, five types of reliability models were established: (1) single component model; (2) series system model; (3) parallel system model; (4) series-parallel system model; and (5) parallel-series system model. Finally, an example of fatigue crack growth dataset is taken to verify the effectiveness of the established model and method, and some sensitivity analyses are given. The results show that the bidirectional effects can significantly accelerate the system failure, and the impact of natural degradation process to random shocks should not be ignored. In addition, the results also show that random shock and failure threshold have significant effects on the different complex systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Reliability Modeling and Evaluation for Complex Systems Subject to New Dependent Competing Failure Process

Hao

2022

Mathematical Problems in Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…Rafiee et al 25 assessed the system reliability with hard failure threshold changing and degradation rate changing in soft failure process simultaneously, when a special shock arrived. Li et al 31 constructed a dependent competing failure process (DCFP) model with hard failure threshold and soft failure threshold changing when the mth shock arrived. Jiang et al 32 introduced a reliability model with a hard failure threshold changing when the lagging time between two shocks is smaller than a certain value.…”

Section: Introductionmentioning

confidence: 99%

“…assessed the system reliability with hard failure threshold changing and degradation rate changing in soft failure process simultaneously, when a special shock arrived. Li et al 31 . constructed a dependent competing failure process (DCFP) model with hard failure threshold and soft failure threshold changing when the m th shock arrived.…”

Section: Introductionmentioning

confidence: 99%

Reliability modeling for multistage systems subject to competing failure processes

Lyu

Yang

Wang

et al. 2021

Quality & Reliability Eng

View full text Add to dashboard Cite

In this paper, a novel multistage reliability model is provided as systems are often divided into many stages according to system degradation characteristics. Multistage hard failure (caused by random shock) process (MHFP) and multistage soft failure (caused by random shock and continuous degradation) process (MSFP) are introduced to describe the competing failure processes, where either the MSFP or MHFP would break down the system. The shock processes impact the system in three ways: (1) fatal load shocks cause hard failure immediately in the hard failure process; (2) time shocks cause a hard failure threshold changing;(3) damage load shocks cause degradation level increasing in the soft failure process. In this paper, a density function dispersion method is carried out to address the multistage reliability model, and the effectiveness of the proposed models is demonstrated by reliability analysis with the one-stage model. Finally, the multistage model is applied to a case study, the degradation process is divided into three stages, and the hard failure threshold can be transmitted twice. The proposed model can be applied in other multistage situations, and the calculation method can satisfy the accuracy requirements.

show abstract

Reliability Evaluation of Multiple DCFP System subject to Shifting Threshold

Cited by 2 publications

References 31 publications

Reliability Modeling and Evaluation for Complex Systems Subject to New Dependent Competing Failure Process

Reliability Modeling and Evaluation for Complex Systems Subject to New Dependent Competing Failure Process

Reliability modeling for multistage systems subject to competing failure processes

Contact Info

Product

Resources

About