分层级故障诊断策略与规则的优先权排序方法

Multiple Hierarchical Diagnosis Strategy and Priority Ranking Method of Rules

针对某些复杂设备很难有效地创建基于元器件层次分解的诊断树的特点,提出基于故障类别信息的分层级故障诊断推理策略,给出相应的规则存储模式并引入规则优先权;然后提出基于模糊多属性群决策理论的规则优先权排序方法;最后给出该诊断推理策略的可信度的传递算法和具体推理流程;应用实例和分析表明,所提出的方法在冲突消解方面具有很好的效果,可有效提升诊断效率。

Abstract~ In equipment fault diagnosis, a multiple hierarchical diagnosis method based on fault categories is proposed, considering the very difficult circumstances to achieve the fault trees based on components framework. Accordingly, the storage model of rules is designed, and the concept of rule priority is introduced. Then, a priority ranking method based on fuzzy multi--attribute group decision making method is presented. Finally, the inexact reasoning flow and the algorithm of confidence level transfer based on the reasoning strategy and method are presented. The application case and analysis show that, the proposed method has good performance to conflict resolution, can improve diagnosis efficiency markedly.