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Communication Dans Un Congrès Année : 2023

REVISITING MULTIDISCIPLINARY TIME-OF-ARRIVAL ESTIMATION METHODS FOR IMPACT DETECTION ON PLATES

Résumé

In the framework of guided waves propagation (GWP), different methods for estimating the time-of-arrival (TOA) of waves excited by impacts on carbon fiber-reinforced polymer (CFRP) plates are assessed. The TOA estimation is an essential ingredient of impact localization and quantification. To detect and measure the propagation of waves, piezoceramic patch ensors are surface-bonded to the plate. The plate is impacted at different locations using an impact hammer and an impact gun. The latter provides information about the energy introduced into the impacted structure. The GWP in thin-walled structures is a very complex and challenging phenomenon in many respects, in particular for anisotropic and multilayer materials. Therefore, this contribution revisits selected TOA estimation methods from two different fields of application: Akaike Information Criterion (AIC) (information theory) and Continuous Wavelet Transform (CWT) (signal processing). The aim is to give practical guidelines of how they can be applied to sensor data from plates under impact-induced GWP, and to identify their individual advantages and disadvantages in order to arrive at reliable TOA estimates, hence the plate’s impact detection. The proposed investigations are based on experiments on an anisotropic (laminated CFRP) plate. The results indicate that the AIC method is capable of producing accurate and robust estimates of the onset time, even when faced with varying conditions such as changes in impact location, different types of impact, and variations in a method-specific parameter. The estimated values can be verified using CWT to determine the frequency components of the wave propagation that they correspond to, which may be very useful for a subsequent impact localization task.

Dates et versions

hal-04486290 , version 1 (01-03-2024)

Identifiants

Citer

Lukas Grasboeck, Alexander Humer, Ayech Benjeddou. REVISITING MULTIDISCIPLINARY TIME-OF-ARRIVAL ESTIMATION METHODS FOR IMPACT DETECTION ON PLATES. 10th ECCOMAS Thematic Conference on Smart Structures and Materials, Jul 2023, Patras, France. pp.107-118, ⟨10.7712/150123.9769.451409⟩. ⟨hal-04486290⟩
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