Reliability analysis for systems with interactive competing degradation processes and mixed shock effects

Bian, Lina; Wang, Guanjun; Liu, Peng

doi:10.1080/15326349.2022.2066128

Cited by 4 publications

(3 citation statements)

References 30 publications

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“…(4) The combination of BeiDou and GPS has the highest number of visible stars when positioning a medium-orbiting spacecraft in a dual-system, which, combined with the higher stability of the combination of GPS and GLONASS and the combination of GPS and Galileo, leads to the conclusion that the accuracy of a spacecraft combined with GPS will be higher than that of the other types of combinations when positioning a medium-orbiting spacecraft [20] .…”

Section: Discussionmentioning

confidence: 99%

Simulation and Analysis of Multi-Signal Middle-Orbit Spacecraft Positioning Performance

Lai,

Ma,

et al. 2024

Advances in Transdisciplinary Engineering

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To address the challenge of autonomous orbiting of space satellites under the increasing number of satellites in space,the Satellite Tool Kit (STK) is used to simulate and analyze the orbiting of medium-orbit satellites under Multi-Global Navigation Satellite System (Multi-GNSS) signals. The four global navigation systems and augmentation systems are modeled by STK. The satellite signals from the navigation systems are received by the middle earth orbit (MEO) satellite. The satellite signals from the navigation systems are received by the middle earth orbit (MEO) satellite receiver, and the number of visible stars, the Dilution of Precision (DOP) value, and the navigation and positioning accuracy are used as the evaluation indexes. The navigation systems are received by the middle earth orbit (MEO) satellite receiver, and the number of visible stars, the Dilution of Precision (DOP) value, and the navigation and positioning accuracy are used as the evaluation indexes to study the optimal positioning mode of the middle-orbit satellites in the case of multi-GNSS. concluded that under single-system positioning, the positioning accuracy of BEIDOU system is higher, up to 4 meters accuracy. Under dual-system positioning, the combined accuracy of BEIDOU system is higher, up to 4 meters accuracy. Under dual-system positioning, the combined accuracy of BEIDOU and the Global Positioning System (GPS) is higher, with an accuracy of about 3 meters.

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Section: Discussionmentioning

confidence: 99%

Simulation and Analysis of Multi-Signal Middle-Orbit Spacecraft Positioning Performance

Lai,

Ma,

et al. 2024

Advances in Transdisciplinary Engineering

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“…Affected by shocks 𝑊 ′ 1 and 𝑊 ′ 2 at moments 𝑡 1 and 𝑡 2 , the total degradation increases and reaches the threshold 𝐷 earlier. 26 The total degradation 𝑋 1 (𝑡) becomes 𝑋 2 (𝑡) when considering the influence of degradation on shocks, 27 as shown in Figure 3.…”

Section: Model Descriptionmentioning

confidence: 99%

Wind turbine gear reliability analysis considering dependent competing failure

Liu,

Gao,

Yuan

et al. 2023

Quality & Reliability Eng

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To more precisely assess the reliability of wind turbine gears, a competing failure model is established with consideration given to the degradation of internal fatigue strength and external random shocks. Firstly, the nonlinear Gamma process is adopted to depict the degradation of fatigue strength, and the strength‐stress interference theory is used to establish the threshold of degradation failure that changes over time. Also, the non‐homogeneous Poisson process is employed to depict the arrival of the shock, and classification of the shocks. Secondly, the correlation between degradation and shock is described, while the effect of shocks on degradation is demonstrated as a sudden increase in the extent of degradation. Besides, the decline rate of residual strength curve is introduced to describe the change in intensity parameters of the Poisson process, and then the effect of degradation on shocks is described. Finally, the sun gear in the wind turbine gearbox is an example. Monte Carlo simulation is used to calculate the reliability of the dependent competing failure model. This is then compared with the conventional stress‐strength interference model. The results verify that when the relationship between degradation and the shock process is disregarded, the reliability of gears may be overestimated.

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“…Finkelstein et al 10 studied two types of hard failure thresholds: deterministic and random, where the deterministic hard failure threshold was regarded as a constant, while the random hard failure threshold was considered a random variable following a particular distribution. Bian et al 11 considered both an extreme shock model and a 𝛿-shock model and treated the hard failure threshold as a function of time. Wu et al 12 argued that hard failure thresholds were affected by environmental factors and should be different for different environments.…”

Section: Introductionmentioning

confidence: 99%

Reliability assessment models for competing failure processes with two types of correlative thresholds

Song,

Tang,

Wei

et al. 2024

Quality & Reliability Eng

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The two dependent competing risks are soft failure due to aging degradation and fragmentation caused by shocks and hard failure due to spring breakage caused by the same shock process. Considering the complexity of the product itself and the instability of the working environment, this study proposed a generalized reliability model for systems experiencing dependent competing failure processes (DCFPs) of degradation and random shocks, which considered two kinds of DCFP: (1) shock process could affect soft failure thresholds; (2) degradation process could affect hard failure thresholds. In case (1), we considered the effect that a cumulative number of shocks above a certain magnitude could have on the change in the soft failure threshold. In case (2), we considered not only the shock process's impact on the soft failure threshold but also the total degradation (including continuous degradation and sudden degradation caused by shock) on the hard failure threshold. The model captures the features that the shocks experienced by the system affect the degradation process, accelerating the system degradation and causing soft failures; the degradation process of the system affects the shock process, making the system more susceptible to failure from external shocks. Finally, an example using micro‐electro‐mechanical systems devices illustrates the effectiveness of the proposed approach with sensitivity analysis.

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Reliability analysis for systems with interactive competing degradation processes and mixed shock effects

Cited by 4 publications

References 30 publications

Simulation and Analysis of Multi-Signal Middle-Orbit Spacecraft Positioning Performance

Simulation and Analysis of Multi-Signal Middle-Orbit Spacecraft Positioning Performance

Wind turbine gear reliability analysis considering dependent competing failure

Reliability assessment models for competing failure processes with two types of correlative thresholds

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