期刊
NDT & E INTERNATIONAL
卷 98, 期 -, 页码 70-79出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ndteint.2018.04.008
关键词
Defect detection; Feature extraction; Frequency response function; Structure health monitoring; System identification
资金
- EPSRC
- AISP [EP/J012343/1]
- EPSRC [EP/J012343/1] Funding Source: UKRI
Feature extraction is the key step for defect detection in Non-Destructive Evaluation (NDE) techniques. Conventionally, feature extraction is performed using only the response or output signals from a monitoring device. In the approach proposed in this paper, the NDE device together with the material or structure under investigation are viewed as a dynamic system and the system identification techniques are used to build a parametric dynamic model for the system using the measured system input and output data. The features for defect detection and characterization are then selected and extracted from the frequency response function (FRF) derived from the identified dynamic model of the system. The new approach is validated by experimental studies with two different types of NDE techniques and the results demonstrate the advantage and potential of using control engineering-based approach for feature extraction and quantitative NDE. The proposed approach offers a general framework for selection and extraction of the dynamic property-related features of structures for defect detection and characterization, and provides a useful alternative to the existing methods with a potential of improving NDE performance.
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