A diagnostic imaging approach for online characterization of multi-impact in aircraft composite structures based on a scanning spatial-wavenumber filter of guided wave

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• 作者：Yuanqiang Ren^a ; Lei Qiu^a ; ^b ; ^{lei.qiu@nuaa.edu.cn} ; Shenfang Yuan^a ; Zhongqing Su^b ; ^{mmsu@polyu.edu.hk}
• 关键词：Aircraft composite structure ; Structural health monitoring ; Impact imaging ; Guided wave ; Spatial-wavenumber filter
• 刊名：Mechanical Systems and Signal Processing
• 出版年：2017
• 出版时间：June 2017
• 年：2017
• 卷：90
• 期：Complete
• 页码：44-63
• 全文大小：5875 K
• 卷排序：90

文摘

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.