PSI - Issue 52

Yuhang Pan et al. / Procedia Structural Integrity 52 (2024) 699–708 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 1. The hybrid system based on vibration and guided wave for damage detection and localization.

3. Methodology In this section, the hybrid method based on vibration and guided wave is proposed to detect and localize the damage, which consists of four parts: the data acquisition, feature extraction and fusion, model development and validation. The roadmap is shown in Fig.2.

Fig. 2. Roadmap of damage detection and localization based on the hybrid method.

3.1. Feature extraction Based on the roadmap summarized in Fig.2, the signal acquisition was presented in Section 2, then the Butterworth bandpass filter was used to remove the noise in the signal. Subsequently, in order to detect and localize damage, some damage sensitive features (DSFs) are needed to establish the damage index (DI) to compare the current and baseline signal. For the GWSHM method, three damage indices are used in this research, as shown in Eq. (1-3).