基于改进熵权-TOPSIS-灰色关联法的加工中心可靠性分析  

Reliability Analysis of Machining Center Based on Improved Entropy Weight-TOPSIS-Grey Correlation Method

作　　者：金圣捷 王德超 金光煜 朴成道[1] 玄东哲 JIN Shengjie;WANG Dechao;JIN Guangyu;PIAO Chengdao;XUAN Dongzhe(College of Engineering,Yanbian University,Yanji Jilin 133002,China)

机构地区：[1]延边大学工学院,吉林延吉133002

出　　处：《机床与液压》2024年第2期222-228,共7页Machine Tool & Hydraulics

基　　金：延边大学科技计划项目(602022130,602020025);吉林省高等教育高教科研项目(JGJX2020D50)。

摘　　要：针对加工中心可靠性评价的复杂性,提出基于改进熵权-TOPSIS-灰色关联相结合的方法。利用改进熵权法对平均无故障工作时间、平均首次失效前工作时间、平均修复时间3个指标进行赋权,得出故障概率最大的子系统。应用TOPSIS-灰色关联方法对发生故障概率最大的子系统建立决策矩阵,计算正理想解和负理想解,得出灰色关联相对贴近度,最终得到各故障模式重要程度的排序。同时与传统频次法进行对比分析,结果表明:采用改进熵权与TOPSIS-灰色关联法对加工中心可靠性评价更合理。Aiming at the complexity of machining center reliability evaluation,a method based on improved entropy weight-TOPSIS-grey correlation was proposed.The subsystem with the highest probability of failure was obtained by using the improved entropy weight for the three indexes:mean time between failures,mean time to first failure and mean time to restoration.The TOPSIS-grey correlation method was used to establish the decision matrix for the subsystem with the highest probability of failure,the positive ideal solution and the negative ideal solution were calculated,the relative closeness degree of grey correlation was obtained,and finally the ranking of the importance degree of each fault mode was acquired.Compared with the traditional frequency method,the results show that it is more rea⁃sonable to use the improved entropy weight and TOPSIS-grey correlation method to evaluate the reliability of machining center.

关 键 词：故障模式 改进熵权 TOPSIS-灰色关联 加工中心 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]