基于证据的数控机床液压系统故障树分析

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS

ACS Applied Bio Materials Pub Date : 2024-05-20 DOI:10.1002/qre.3581

Hong‐Xia Chen, Sui‐Xin Xie, Jun‐Feng Zhang, Wang‐Hao Chen, Bo Niu, Jiao‐Teng Zhang

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引用次数: 0

摘要

液压系统是数控机床不可分割的一部分。在分析机床液压系统的可靠性时，其故障会受到已知不确定性和认识不确定性的影响。本文利用故障树分析方法来处理受认识不确定性影响的故障模式，并使用区间粗略数评分法来评估此类故障发生的概率。由此计算出的可靠性称为 "主观可靠性"。对于受已知不确定性影响的失效模式，则采用与 Dempster-Shafer 证据理论相结合的客观数据来确定其失效概率，相应的可靠性计算称为 "客观可靠性"。最后，对主观可靠性和客观可靠性进行综合计算，确定液压系统的整体可靠性，以及故障树基本事件的重要性排序。该方法涵盖了小样本、充足数据及其组合的情况，具有广泛的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Evidence‐based fault tree analysis of the hydraulic system in CNC machine tools

The hydraulic system is an integral part of CNC machine tools. In analyzing the reliability of machine tool hydraulic systems, their failures are influenced by both aleatory and epistemic uncertainties. This paper utilizes the fault tree analysis method to address failure modes subject to epistemic uncertainty, using the interval rough number scoring method to evaluate the probability of such failures occurring. The resulting reliability calculation is termed as “subjective reliability”. For failure modes influenced by aleatory uncertainty, objective data combined with the Dempster–Shafer evidence theory is used to determine their failure probability, with the corresponding reliability calculation referred to as “objective reliability”. Finally, a comprehensive calculation of both subjective and objective reliability is conducted to determine the overall reliability of the hydraulic system, along with the ranking of the importance of basic events of fault tree. This methodology covers scenarios with small samples, sufficient data, and their combinations, offering extensive application prospects.

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来源期刊

ACS Applied Bio Materials Chemistry-Chemistry (all)

CiteScore

9.40

自引率

2.10%

发文量

464

期刊介绍： ACS Applied Bio Materials is an interdisciplinary journal publishing original research covering all aspects of biomaterials and biointerfaces including and beyond the traditional biosensing, biomedical and therapeutic applications. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important bio applications. The journal is specifically interested in work that addresses the relationship between structure and function and assesses the stability and degradation of materials under relevant environmental and biological conditions.