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.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
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)
关键词
数控机床
可靠性建模
元任务
GO法
马尔可夫
CNC machine
reliability modelling
meta- task
GO methodology
Markov theory
