Feature extraction approach insensitive to temperature variations for impedance‐based structural health monitoring

Campos, F. de; Castro, Bruno Albuquerque de; Budoya, Danilo Ecidir; Baptista, Fabrício Guimarães; Ulson, José Alfredo Covolan; Andreoli, André Luiz

doi:10.1049/iet-smt.2018.5226

Cited by 10 publications

(4 citation statements)

References 39 publications

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“…Structural health monitoring (SHM) has been considered a revolutionary technology for the operation and maintenance of aircraft structures [ 1 ]. At present, some SHM technologies, such as acoustic emission [ 2 , 3 ], eddy current [ 4 , 5 , 6 ], Lamb wave [ 7 , 8 ], impedance [ 9 , 10 ], vibration [ 11 , 12 ], and comparative vacuum [ 13 ] monitoring, have received greatly focused research and development for damage detection in aircraft structures. Lamb wave-based damage imaging, which is an active detection technology suitable for large-scale structures, is a promising technology for the health monitoring of aircraft plate structures [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

A Local TR-MUSIC Algorithm for Damage Imaging of Aircraft Structures

Fan

Zhang

Sun

et al. 2021

Sensors

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Lamb wave-based damage imaging is a promising technique for aircraft structural health monitoring, as enhancing the resolution of damage detection is a persistent challenge. In this paper, a damage imaging technique based on the Time Reversal-MUltiple SIgnal Classification (TR-MUSIC) algorithm is developed to detect damage in plate-type structures. In the TR-MUSIC algorithm, a transfer matrix is first established by exciting and sensing signals. A TR operator is constructed for eigenvalue decomposition to divide the data space into signal and noise subspaces. The structural space spectrum of the algorithm is calculated based on the orthogonality of the two subspaces. A local TR-MUSIC algorithm is proposed to enhance the image quality of multiple damages by using a moving time window to establish the local space spectrum at different times or different distances. The multidamage detection capability of the proposed enhanced TR-MUSIC algorithm is verified by simulations and experiments. The results reveal that the local TR-MUSIC algorithm can not only effectively detect multiple damages in plate-type structures with good image quality but also has a superresolution ability for detecting damage with distances smaller than half the wavelength.

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Section: Introductionmentioning

confidence: 99%

A Local TR-MUSIC Algorithm for Damage Imaging of Aircraft Structures

Fan

Zhang

Sun

et al. 2021

Sensors

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“…The experimental results indicated that the proposed variable F increases the robustness of the damage detection as compared to the quantities R and G, which demonstrated the effectiveness of the methodology. Campos et al [ 23 ] proposed a feature extraction approach insensitive to temperature variation for the impedance-based SHM technique. This study presents a new feature extraction approach that is insensitive to temperature variations.…”

Section: Introductionmentioning

confidence: 99%

Electromechanical Impedance Model for Free 1D Thin-Walled Piezoelectric Ceramics with a Novel Derivation

et al. 2020

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The electromechanical impedance model of the piezoelectric ceramics in a free state can be used for screening and quality control in the structural health monitoring community, but the derivation process of the existing model is usually complicated. This paper describes a novel theoretical derivation methodology based on the assumption of zero-stress on the free boundary of the one-dimensional transducer, which can simplify the derivation of the model to a large extent. To assess the accuracy of the model, a signal processing method based on frequency shifting transformation and the Pearson correlation coefficient is also proposed to calculate the similarity between theoretically predicted and experimentally measured data. Two different piezoelectric ceramics were used in experiments to verify the effectiveness of the model. Experimental results convincingly demonstrate that the assumption proposed in this paper possesses good feasibility for one-dimensional thin-walled piezoelectric ceramics and the model has excellent precision.

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“…ZnO PENG piezoelectric properties should be studied as a function of temperature if they are meant to be used at temperatures higher than room temperature. As the temperature of the PENG changes, its piezoelectric properties and impedance will change as well [109,110]. As a result, the optimal resistance value for maximum power transfer will change [109,110].…”

mentioning

confidence: 99%

“…As the temperature of the PENG changes, its piezoelectric properties and impedance will change as well [109,110]. As a result, the optimal resistance value for maximum power transfer will change [109,110].…”

mentioning

confidence: 99%

Review of Zinc Oxide Piezoelectric Nanogenerators: Piezoelectric Properties, Composite Structures and Power Output

Bhadwal

Mrad

Behdinan

2023

Sensors

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Lead-containing piezoelectric materials typically show the highest energy conversion efficiencies, but due to their toxicity they will be limited in future applications. In their bulk form, the piezoelectric properties of lead-free piezoelectric materials are significantly lower than lead-containing materials. However, the piezoelectric properties of lead-free piezoelectric materials at the nano scale can be significantly larger than the bulk scale. This review looks at the suitability of ZnO nanostructures as candidate lead-free piezoelectric materials for use in piezoelectric nanogenerators (PENGs) based on their piezoelectric properties. Of the papers reviewed, Neodymium-doped ZnO nanorods (NRs) have a comparable piezoelectric strain constant to bulk lead-based piezoelectric materials and hence are good candidates for PENGs. Piezoelectric energy harvesters typically have low power outputs and an improvement in their power density is needed. This review systematically reviews the different composite structures of ZnO PENGs to determine the effect of composite structure on power output. State-of-the-art techniques to increase the power output of PENGs are presented. Of the PENGs reviewed, the highest power output belonged to a vertically aligned ZnO nanowire (NWs) PENG (1-3 nanowire composite) with a power output of 45.87 μW/cm2 under finger tapping. Future directions of research and challenges are discussed.

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Feature extraction approach insensitive to temperature variations for impedance‐based structural health monitoring

Cited by 10 publications

References 39 publications

A Local TR-MUSIC Algorithm for Damage Imaging of Aircraft Structures

A Local TR-MUSIC Algorithm for Damage Imaging of Aircraft Structures

Electromechanical Impedance Model for Free 1D Thin-Walled Piezoelectric Ceramics with a Novel Derivation

Review of Zinc Oxide Piezoelectric Nanogenerators: Piezoelectric Properties, Composite Structures and Power Output

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