大型桥梁健康监测系统传感器异常诊断方法研究

Sensors Fault Diagnosis of Large Bridge Structural Health Monitoring Systems

针对结构健康监测研究领域内尚缺乏传感器异常诊断研究的问题,该文将灰色系统理论中的灰色关联度分析方法引入大型桥梁结构健康监测系统的传感器异常诊断中。在对灰色关联度分析方法的步骤、基本原理进行研究的基础上,得到了判断测试数据关联性优劣的灰色关联度阈值,并采用灰色关联度分析方法对江阴大桥应变实测数据进行了关联度分析计算,判断得出:除少数可能工作异常的传感器之外,大多数传感器工作正常。

In order to deal with lack of fault diagnosis of sensors in field of structural health monitoring,the method of grey correlation,consisting in the theory of grey systems,was introduced to fault diagnosis of sensors of structural health monitoring systems in large bridges.Based on research of the principle of grey correlation analysis,the threshold value σthr of grey correlation was obtained to determine the quality of data correlation.Furthermore,correlation of the measured data of strain in Jiangyin bridge was given and it was decided that most of these sensors worked well except the few probably abnormal ones.