全系统故障诊断策略及应用

The Theory and Application of Plenary Diagnostics Strategy

状态监测与故障诊断是基于条件的维修方法的基础,目前对于诊断算法和状态监测产品已有较多的研究,但是诊断策略与管理则涉及较少。全系统诊断法基于各诊断级别间诊断数据的传输,并以之为事件驱动,是对传统诊断策略的一种改进。在全系统诊断法中,监测中的异常首先在运行级中被发现或隔离,然后异常事件从较低的诊断级别向较高级别传输,并被集中分析,最后作为诊断更新信息反馈,以改进各诊断模块。本文介绍了全系统诊断法的诊断数据流和管理策略,比较了该法与传统诊断策略的区别,并以电力设备故障诊断为例加以说明。

Condition monitoring and fault diagnosis is the groundwork of condition-based maintenance,and much research has been done about diagnostic algorithm and monitoring manufactures,but less research about diagnostics strategy and management. Plenary diagnostics based on event driven threads of data propagated through successive diagnostic levels is an improving attempt about it. In this approach,abnormities are firstly detected or isolated in operational level. Then the anomalous event data is transmitted from low diagnostic level to higher levels,collected and centrally analyzed and finally fed back as diagnostic updates to improve diagnosis modules. This paper describes the diagnostic data flow and the management strategy of plenary diagnostics,and the difference between which and conventional diagnostics strategy. Finally,an example about power equipments fault diagnosis is given.