Title: Impact point localization in three-dimensional structures using wavelet transform
Authors: Houdek, Václav
Smolík, Luboš
Kubín, Zdeněk
Citation: HOUDEK, V. SMOLÍK, L. KUBÍN, Z. Impact point localization in three-dimensional structures using wavelet transform. MECHANICAL SYSTEMS AND SIGNAL PROCESSING, 2022, roč. 179, č. November, s. nestránkováno. ISSN: 0888-3270
Issue Date: 2022
Publisher: Academic Press
Document type: článek
URI: 2-s2.0-85131369376
ISSN: 0888-3270
Keywords in different language: Time of arrival;Continuous wavelet transform;Impact-induced vibration;Impact point localization;Damage localization
Abstract in different language: Impact-induced anomalies such as travelling waves can be found in many devices or structures. This article provides an experimental method to localize a point of impact in three-dimensional structures using an array of redundant sensors. Concurrent measurement of vibration waveforms in moving measurement points and stationary reference allows determining the times of arrival of the travelling wave and, more importantly, times of arrival relative to the reference. These relative times of arrival allow for employing more measurement points than channels in the data acquisition system. This work proposes a modified method to estimate the times of arrival by combining continuous wavelet transform with optimal interval partitioning. The work also considers that the path between the impact and the measurement point depends on the properties of the structure, causing apparent wave speeds to differ across the measurement points. Therefore, regular triangulation and multilateration methods, which assume equal wave speeds, offer a reduced accuracy. The localization is solved as a constraint optimization problem considering variable apparent speeds.
Rights: Plný text je přístupný v rámci univerzity přihlášeným uživatelům.
© Elsevier
Appears in Collections:Články / Articles (KME)

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