基于知识的结构故障诊断理论

A Knowledge-Based Fault Diagnosis Theory of Structures

一、引言长期以来,基于动力特性的结构故障诊断方法一直是国际学术界和工程界关注的热点。结构故障诊断主要包括3方面的内容:1)结构损伤识别;2)结构损伤定位;3)结构损伤程度的标定和评价。损伤识别是进行结构故障诊断的基础,目前国际上关于结构故障诊断的研究多集中在损伤识别的层次上;损伤定位是进行结构故障诊断的核心,也是问题的难点所在。目前。

A systematic research is made on the basic principles and methods for fault diagnosis of structural systems, some of the popular fault diagnosis methods are extended, and a set of new structural fault diagnosis formula are suggested. The present paper discovers that it is helpful for solving completely the fault diagnosis problems of structures to consider physics constrains and to use experts' empirical knowledge, and a new knowledge-based theory for structural fault diagnosis is established by an integration of generalized genetic algorithm, artificial neural network and the automatic generation algorithm of fault tree.