Reliability modeling for systems degrading in <i>K</i> cyclical regimes based on gamma processes

Shen, Jingyuan; Elwany, Alaa; Cui, Lirong

doi:10.1177/1748006x18758798

Cited by 6 publications

(4 citation statements)

References 34 publications

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“…It includes the Wiener process, Gamma process and Inverse Gaussian (IG) process. [26][27][28][29][30] Note that the Wiener process is the most flexible process, which is widely used in ADT modeling and prediction. Liu and Wang 31,32 proposed a degradation modeling and reliability estimation method based on the Wiener process.…”

Section: Introductionmentioning

confidence: 99%

Reliability assessment of PEEK/17-4PH stainless steel tribopair under seawater lubrication

Nie

Song

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part O:

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The high reliability and extended life of seawater hydraulic components depends on the tribological properties of the key tribopairs. The main reason that restricts their life is the wear of the tribopairs in relative motion. Therefore, the performance degradation of the tribopair should be investigated. Due to the limitation of the test sample size and test time, a large number of tests cannot be performed in a short period of time. Therefore, with the development of the sensor and monitoring technologies, the Accelerated Degradation Testing (ADT) has become an accelerated test method that can efficiently select and analyze the reliability of tribopairs. In this paper, the friction and wear characteristics of polyether ether ketone (PEEK)/17-4PH stainless steel are investigated, and the acceleration stress related to its performance is analyzed. Taking into account the random characteristics of the degradation process, an ADT model based on the Wiener stochastic process is constructed, while using the MLE solver. Finally, the model is estimated and verified using PEEK/17-4PH stainless steel experimental data. The results show that the proposed model helps the reliable assessment and further research of tribopair material.

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Section: Introductionmentioning

confidence: 99%

Reliability assessment of PEEK/17-4PH stainless steel tribopair under seawater lubrication

Nie

Song

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part O:

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show abstract

“…To derive the probabilistic indices of the reliability models based on practical engineering cases, existing research has put forward various methodologies of reliability analysis, including universal generating function technique 29,30 and stochastic process models [31][32][33] and so on. Owing to its high efficiency and effectiveness in reliability analyses, a multi-stage FMCIA is formulated for the reliability assessment of the proposed shock model.…”

Section: Introductionmentioning

confidence: 99%

Generalized mixed shock model for multi-component systems in the shock environment with a change point

Wang

Ning

Zhao

2022

Proceedings of the Institution of Mechanical Engineers, Part O:

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The reliability of various systems under shock models has been explored extensively in the literature, where the constant mechanism of shock impact has always been studied. Nevertheless, engineering systems operate in a more complicated shock environment due to developments, and it is worth studying the reliability of such multi-component systems in a variable shock environment. Driven by the research gaps and practical situations, this paper constructs a reliability model of multi-component systems under a generalized mixed shock model with a change point. The multi-state components operate in the shock environment I initially and it may continue to run in the shock environment II after the random change point of the environment. Two novel shock impact mechanisms of the variable environment are put forward, where a series of failure criteria based on shocks are included. Four different structures of multi-component systems are considered in this paper. It can be proved that the proposed mixed shock model is a generalization of some transformed models. A multi-stage finite Markov chain imbedding approach is established to derive the probabilistic indices of the components and entire systems. Based on the engineering applications, illustrative examples are provided to verify the effectiveness of the proposed model.

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“…1,2 For degradation analysis, the general path model, Wiener process model, Gamma process model, inverse Gaussian (IG) process model have been widely used. [3][4][5][6][7] Specially, the IG processes model has been widely used in modeling performance degradation of a mechanical product, which is often monotonically increasing and affected by complex working conditions. The life-stress relationship may be a physics-based model such as Arrhenius model for temperature, Eyring model for temperature and humidity, and Blattau model for temperature cycling, 3 or a statistics-based model such as a log-linear relationship.…”

Section: Introductionmentioning

confidence: 99%

A load spectra design method for multi-stress accelerated testing

Nie

Liao

2021

Proceedings of the Institution of Mechanical Engineers, Part O:

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Accelerated testing (AT) is an effective testing method for evaluating the reliability of highly reliable products. In many applications, such products are often subject to multiple stresses in actual working environments. Then, how to design the load spectra for multi-stress AT becomes a critical issue. In this paper, a new load spectra design method is proposed to overcome this challenge. Considering the properties of multiple stresses, a novel multi-stress loading matrix (MSLM) is modified to fully describe the load spectra in actual working environments and to generate the corresponding load spectra for AT. For illustration purposes, an inverse Gaussian (IG) process incorporating life-stress relationships is adopted to model product degradation under multiple stresses. A case study on a type of hydraulic piston pump is provided to demonstrate the use of the proposed method in guiding the load spectra design for multi-stress AT.

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Reliability modeling for systems degrading in K cyclical regimes based on gamma processes

Cited by 6 publications

References 34 publications

Reliability assessment of PEEK/17-4PH stainless steel tribopair under seawater lubrication

Reliability assessment of PEEK/17-4PH stainless steel tribopair under seawater lubrication

Generalized mixed shock model for multi-component systems in the shock environment with a change point

A load spectra design method for multi-stress accelerated testing

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