A diagnostic imaging approach for online characterization of multi-impact in aircraft composite structures based on a scanning spatial-wavenumber filter of guided wave
We propose a multi-impact imaging and localization method based on the scanning spatial-wavenumber filter. The spatial-wavenumber filtering of multi-impact signal is realized without wavenumber measuring or modeling. Identification of multiple impacts in the wavenumber-time image is achieved. The angle-distance image can be generated to directly obtain the polar coordinates of the multiple impacts. The multi-impact imaging and localization on a composite structure is realized.