基于区间分析的数控机床可靠性模糊综合分配方法

A Comprehensive Fuzzy Reliability Allocation Method of NC Machine Tools Based on Interval Analysis

为了解决数控机床可靠性分配过程中具有多种影响因素且有些因素难以定量分析的问题,研究了一种将区间分析、模糊综合评判和层次分析法相结合的可靠性综合分配方法.综合考虑多种影响因素,根据影响程度大小给每个因素赋予相应的权重;使用模糊区间数代替实数来表达不确定信息,综合利用现场试验信息和专家经验,建立了数控机床可靠性分配模型;结合实例进行了整机的可靠性分配.结果表明,该方法是可行的,且能有效解决目前数控机床可靠性分配中存在的主要问题.

To solve the problem that there are many factors influencing the reliability allocation of NC machine tools and some of which are difficult to analyze quantitatively,a comprehensive reliability allocation method is researched using interval analysis,fuzzy comprehensive evaluation and analytic hierarchy process.Many influence factors were considered and endowed with different weight respectively according to the influence degree.In this paper,a reliability allocation model is proposed for NC machine tools,which used interval number instead of real number to express uncertain information.It could make use of the field test information and expert＇s experience comprehensively.Finally,the application of this method is illustrated with an example,and the results showed that the allocation method is feasible and effective for the reliability allocation of NC machine tools.