基于任务的数控机床加工过程可靠性建模技术研究  

Research on Reliability Modeling Technology for Machining Process of CNC Machine Tools Based on Task

作　　者：王国强[1] 张根保[2] 洪涛[1] 陈家焱[1] 

机构地区：[1]中国计量学院,杭州310018 [2]重庆大学,重庆400030

出　　处：《中国机械工程》2013年第10期1296-1302,共7页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(51175527;50835008);国家质检公益类项目(20120101);国家科技重大专项(2010ZX04014-015;2011ZX04003-031;2012ZX04011-031);浙江省自然科学基金资助项目(LQ12E05019)

摘　　要：在分析现有数控机床可靠性建模研究局限性的基础上,将元任务引入到数控机床的可靠性研究领域,介绍了元任务的概念,建立了结构化的任务分解模型,利用GO法建立了元任务的动态可靠性模型,分析了各元任务和元任务组之间的关系。利用马尔可夫方法建立了元任务组的动态可靠性模型,并以该方法建立了某型国产加工中心的动态可靠性模型。Based on analysis of the limitation of existing research on reliability modelling of CNC machine,meta-task was introduced into this area,and the concept of meta-task was discussed,The model of task decompose of structures was founded,the GO methodology was used to establish meta -task reliability dynamic model, the relation between the meta-task and meta-task group was ana- lysed, the Markov theory was used to establish meta-task group reliability dynamic model. The task -based reliability model was fully established. Taking a certain type of machining center made in Chi- na as an example,which shows that the method is useable and correct and provides a practical solution for reliability modeling of CNC machine tools.

关 键 词：数控机床 可靠性建模 元任务 GO法 马尔可夫 

分 类 号：TH137[机械工程—机械制造及自动化]