Adaptive Fault Diagnosis for Simultaneous Sensor Faults in Structural Health Monitoring Systems

被引:10
|
作者
Al-Zuriqat, Thamer [1 ]
Geck, Carlos Chillon [1 ]
Dragos, Kosmas [1 ]
Smarsly, Kay [1 ]
机构
[1] Hamburg Univ Technol, Inst Digital & Autonomous Construct, Blohmstr 15, D-21079 Hamburg, Germany
关键词
structural health monitoring (SHM); fault diagnosis (FD); multiple sensor faults; simultaneous sensor faults; artificial neural network (ANN); adaptive fault diagnosis; ACTUATOR;
D O I
10.3390/infrastructures8030039
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Structural health monitoring (SHM) is a non-destructive testing method that supports the condition assessment and lifetime estimation of civil infrastructure. Sensor faults may result in the loss of valuable data and erroneous structural condition assessments and lifetime estimations, in the worst case with structural damage remaining undetected. As a result, the concepts of fault diagnosis (FD) have been increasingly adopted by the SHM community. However, most FD concepts for SHM consider only single-fault occurrence, which may oversimplify actual fault occurrences in real-world SHM systems. This paper presents an adaptive FD approach for SHM systems that addresses simultaneous faults occurring in multiple sensors. The adaptive FD approach encompasses fault detection, isolation, and accommodation, and it builds upon analytical redundancy, which uses correlated data from multiple sensors of an SHM system. Specifically, faults are detected using the predictive capabilities of artificial neural network (ANN) models that leverage correlations within sensor data. Upon defining time instances of fault occurrences in the sensor data, faults are isolated by analyzing the moving average of individual sensor data around the time instances. For fault accommodation, the ANN models are adapted by removing faulty sensors and by using sensor data prior to the occurrence of faults to produce virtual outputs that substitute the faulty sensor data. The proposed adaptive FD approach is validated via two tests using sensor data recorded by an SHM system installed on a railway bridge. The results demonstrate that the proposed approach is capable of ensuring the accuracy, reliability, and performance of real-world SHM systems, in which faults in multiple sensors occur simultaneously.
引用
收藏
页数:17
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