一种数控机床故障模式重要度分析新方法

发布时间：2018-04-06 03:12

本文选题：数控机床　切入点：故障模式　出处：《机械科学与技术》2017年11期

【摘要】：针对数控机床故障模式重要度传统分析方法主观性较强、基础数据匮乏且一般较少从整机角度进行分析的问题,提出一种基于影响因素模糊定量评价和蒙特卡洛仿真的数控机床故障模式重要度分析新方法。该方法在综合考虑数控机床故障模式重要度各影响因素的基础上,建立了数控机床故障模式重要度评价因素集;应用Delphi法确定影响因素的评价等级和评分准则,同时结合变异系数法和均值的思想确定专家权重来修正因素评分;并利用模糊层次分析法确定各评价因素的权重及优先等级;然后结合线性加权模型,编写MATLAB程序进行蒙特卡洛仿真,对各故障模式进行重要度统计分析,从系统的角度对各故障模式的重要度进行等级排序;通过实例验证了该方法的合理性与有效性。
[Abstract]:Aiming at the problem that the traditional analysis method of fault mode importance of NC machine tool is more subjective, the basic data is scarce and the whole machine is less analyzed,A new method based on fuzzy quantitative evaluation of influencing factors and Monte Carlo simulation is proposed to analyze the importance of fault mode of NC machine tools.On the basis of synthetically considering the factors affecting the importance of the failure mode of NC machine tool, the evaluation factor set of the importance degree of the fault mode of NC machine tool is established, and the evaluation grade and scoring criterion of the influencing factor are determined by using Delphi method.At the same time combined with the idea of coefficient of variation and mean to determine the expert weight to modify the factor score; and use the fuzzy analytic hierarchy process to determine the weight and priority of each evaluation factor; then combined with the linear weighting model,The Monte Carlo simulation program of MATLAB is written, the importance of each fault mode is statistically analyzed, and the importance degree of each fault mode is ranked from the system point of view, and the rationality and effectiveness of the method are verified by an example.
【作者单位】：重庆大学机械传动国家重点实验室;
【基金】：国家自然科学基金项目(51575070) 国家科技重大专项项目(2013ZX04012-041,2014ZX04001-031)资助
【分类号】：TG659

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