Feature extraction and classification techniques for health monitoring of structures

Damage identication in Structural Health Monitoring (SHM) involves three main steps: signal acquisition, signal processing, and feature extraction and interpretation. Recently, the authors presented a review of recent articles on signal processing techniques for vibration-based SHM. This article presents a review of journal articles on feature extraction and classication techniques in order to assess the health condition of a structure in an automated manner. This review is limited to civil structures such as buildings and bridges. The methods reviewed are neural networks, wavelets, fuzzy logic, support vector machine, linear discriminant analysis, clustering algorithms, Bayesian classiers, and hybrid methods. Further, two novel algorithms with potential for feature classication in SHM are suggested.