A comprehensive and practical reliability allocation method considering failure effects and reliability costs

Yu, Hui; Zhang, Genbao; Ran, Yan; Li, Mengqi; Wang, Yan

doi:10.17531/ein.2018.2.09

Cited by 14 publications

(9 citation statements)

References 18 publications

(27 reference statements)

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“…Therefore, the ratio of the number of connections assembled to the number of all connections can be taken as the probability of joining parts. From the point of view of work station reliability, it is advantageous to ensure a high probability of joining the parts, because this results in a reduction in the cost of its operation due to a lowering of the downtime [31]. Industrial robots, which are the main pieces of equipment on the stands, are delivered to the user with a very small amount of information regarding their accuracy.…”

Section: Effect Of Temperature Variation On Repeatability Positioning Of a Robot When Assembling Parts With Cylindrical Surfaces Wpływ Zmmentioning

confidence: 99%

Effect of temperature variation on repeatability positioning of a robot when assembling parts with cylindrical surfaces

Kluz¹,

Sęp²,

Trzepieciński³

2018

Eksploatacja i Niezawodność – Maintenance and Reliability

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Section: Effect Of Temperature Variation On Repeatability Positioning Of a Robot When Assembling Parts With Cylindrical Surfaces Wpływ Zmmentioning

confidence: 99%

Effect of temperature variation on repeatability positioning of a robot when assembling parts with cylindrical surfaces

Kluz¹,

Sęp²,

Trzepieciński³

2018

Eksploatacja i Niezawodność – Maintenance and Reliability

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“…Chang [14] considered the hesitant fuzzy linguistic term sets and minimal variance OWGA (Ordered weighted geometric averaging) to flexibly allocate system reliability. Yu et al [15] developed a fuzzy allocation method considering failure effects and reliability costs. Hao et al [16] performed the fuzzy maintainability allocation on the numerical control machine using interval analysis with considerations of main influential factors.…”

Section: Introductionmentioning

confidence: 99%

A practical reliability design method considering the compound weight and load-sharing

Coolen

Zhu

2020

International Journal of Approximate Reasoning

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Reliability design is an important work in the early design stage of offshore wind turbines. Due to the incomplete considerations and poor feasibility of the drawbacks for existing methods, a set of the practical reliability design method is proposed in this paper. The time characteristics and many influential factors of units are considered in the design process. The influential factors of the system's units are scored by several experts with extensive engineering experience. Based on this, the reliability allocation and the maintainability prediction of the repairable system are performed using different methods. To realistically evaluate the reliability level of each unit obtained by three different methods, a fuzzy reliability evaluation method is developed to rank the reliability level of each unit with considerations of the mean time between failure (MTBF), mean time to repair (MTTR), failure frequency and availability using the compound weight and fuzzy membership function. Following this, redundant design is used to eliminate weaknesses to keep the system reliability at a high level. Using the reliability data obtained above, a time-dependent reliability model of the system considering load sharing is built to explore the influences of reliability allocation on the system reliability in the 20-year service life. The effectiveness and feasibility of the proposed approaches are demonstrated with a 5MW offshore wind turbine.

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“…The cost-based allocation method neglects the importance of time and benefit to producers, and the allocation process of this method is so complicated that its applicability is not good. 2 At the same time, these general reliability allocation methods either do not consider the influencing factors of reliability allocation or are not comprehensive enough to consider these influencing factors, and the allocation results are not accurate enough and lack of reasonable optimization treatment for allocation results. 3 To solve these problems, scholars at home and abroad have done a lot of research, such as Yang 4 used the analytic hierarchy process to assign reliability to each subsystem of the machine tool, and the method combined interval analysis and fuzzy comprehensive evaluation was also introduced in the reliability allocation, which improved the accuracy of the allocation result.…”

Section: Introductionmentioning

confidence: 99%

Research on reliability allocation technology for NC machine tool meta‐action

Zhang

Wang

et al. 2019

Quality & Reliability Eng

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The reliability of machine tool is getting more and more attention. Reasonable reliability allocation is beneficial to improve the inherent reliability of machine tool. However, the existing reliability allocation methods for machine tool have some limitations. For example, static part is selected as the reliability allocation object of machine tool, which cannot reflect the characteristics "function realized by motion"; factors affecting reliability allocation are not considered comprehensively, weights of experts are treated as the same, and the allocation results are not optimized or the impact of time on enterprise is neglected in the optimization. To solve these problems, a new multiobjective optimization reliability allocation method for machine tool is proposed in this paper. Firstly, the latest achievements about meta-action are given, and meta-action is set as the reliability allocation object. Secondly, more reasonable and comprehensive factors affecting reliability allocation are extracted. Thirdly, expert weight coefficient is brought to reduce the subjective impact of expert scoring. Fourthly, time factor is brought to make the optimized allocation results more reasonable and accurate. Finally, a numerical control (NC) machine tool made in China is taken as an example, with a comparison on the reliability allocation results of current methods and proposed method. The results verify the applicability, rationality, and accuracy of the proposed method, which lays a foundation for the subsequent study on the quality characteristics of machine tool based on meta-action.

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A comprehensive and practical reliability allocation method considering failure effects and reliability costs

Cited by 14 publications

References 18 publications

Effect of temperature variation on repeatability positioning of a robot when assembling parts with cylindrical surfaces

Effect of temperature variation on repeatability positioning of a robot when assembling parts with cylindrical surfaces

A practical reliability design method considering the compound weight and load-sharing

Research on reliability allocation technology for NC machine tool meta‐action

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