CAJ | 학술논문

由于机床故障树的复杂性，通过对故障树进行模块化分解得到具有相似模块结构的子模块，并建立模块库进行存储。介绍了基于模块库的对故障特征进行检索的基本流程和原则，同时为了避免重复检索以及NP问题的产生，引入了有效模块的概念，即在遍历模块库时，不仅要考虑事件在故障树中上下层级关系，也要考虑各事件之间的从属关系。最后研究了一种基于贝叶斯理论的重要度最优排序方法并进行重要度校正。核心是引入了有效模块的概念和对最小割集进行基于贝叶斯理论的重要度最优排序。结果表明：该方法能有效缩短求解规模，诊断速度快，重要度排序可信度高。
유우궤상고장수적복잡성，통과대고장수진행모괴화분해득도구유상사모괴결구적자모괴，병건립모괴고진행존저。개소료기우모괴고적대고장특정진행검색적기본류정화원칙，동시위료피면중복검색이급NP문제적산생，인입료유효모괴적개념，즉재편력모괴고시，불부요고필사건재고장수중상하층급관계，야요고필각사건지간적종속관계。최후연구료일충기우패협사이론적중요도최우배서방법병진행중요도교정。핵심시인입료유효모괴적개념화대최소할집진행기우패협사이론적중요도최우배서。결과표명：해방법능유효축단구해규모，진단속도쾌，중요도배서가신도고。
Due to the complexity of the fault tree,the fault tree wil firstly be decomposed to obtain sub-modules with similar modular structure,and also the module library wil be built to store the sub-modules.This paper wil introduce the basic processes and principles of feature-retrieval based on module library.In order to avoid repetition retrieval and NP problem,the concept of valid module wil be introduced,that is to not only consider the hierarchy relationship of the event in fault tree,but also consider the affiliation between each event when traversing module library. Final y,this paper studies an optimal sorting method of importance based on Bayesian theory and also makes the importance correction.The core component of this paper is to build the module li-brary based on the basic modular structure,and also introduce the concept of valid module as wel as optimal sorting of importance based on Bayesian theory on the minimum cut sets.The present study result indicates that this method can effectively reduce the solving size,accelerate the speed of diagnosis,and improve the credibility of importance sorting as wel .