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This paper proposes a probabilistic approach for localizing damage in plate‐like structures by using particle filter (PF) method with considerations of the uncertainties from modeling and measurement. A piezoelectric sensor network is deployed on the plate‐like structures to excite and receive diagnostic Lamb waves before and after damage. The damage‐scattered waves that contain characteristic information about the damage are then obtained and used for damage localization. A complex Morlet wavelet transform is employed to highlight the time‐of‐arrival of the scattered waves in each actuator–sensor path to help measuring the time‐of‐flight values. After that, damage localization is formulated as a Bayesian state estimation problem with the damage location and the wave velocity as the unknown state parameters. A PF procedure is developed to iteratively estimate the unknown parameters simultaneously. Numerical study for an aluminum plate and experimental study for a stiffened aluminum panel are conducted to demonstrate the effectiveness and applicability of the proposed PF‐based localization method. Copyright © 2013 John Wiley & Sons, Ltd.
This paper proposes a probabilistic approach for localizing damage in plate‐like structures by using particle filter (PF) method with considerations of the uncertainties from modeling and measurement. A piezoelectric sensor network is deployed on the plate‐like structures to excite and receive diagnostic Lamb waves before and after damage. The damage‐scattered waves that contain characteristic information about the damage are then obtained and used for damage localization. A complex Morlet wavelet transform is employed to highlight the time‐of‐arrival of the scattered waves in each actuator–sensor path to help measuring the time‐of‐flight values. After that, damage localization is formulated as a Bayesian state estimation problem with the damage location and the wave velocity as the unknown state parameters. A PF procedure is developed to iteratively estimate the unknown parameters simultaneously. Numerical study for an aluminum plate and experimental study for a stiffened aluminum panel are conducted to demonstrate the effectiveness and applicability of the proposed PF‐based localization method. Copyright © 2013 John Wiley & Sons, Ltd.
A particle filter method for damage location in plate‐like structures by using Lamb waves
Yan, Gang (author)
Structural Control and Health Monitoring ; 21 ; 847-867
2014-06-01
21 pages
Article (Journal)
Electronic Resource
English
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