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Article

Gain-Phase Error-Calibrated Piezoelectric Sensor Array-Based Impact Localization on Stiffened Curved Composite Structures

1
School of Mechanical and Electrical Engineering, Jinling Institute of Technology, Nanjing 211169, China
2
College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325035, China
*
Author to whom correspondence should be addressed.
Academic Editors: Anne Bernassau and Marco Aurélio Brizzotti Andrade
Sensors 2022, 22(15), 5879; https://doi.org/10.3390/s22155879
Received: 2 July 2022 / Revised: 1 August 2022 / Accepted: 3 August 2022 / Published: 5 August 2022
(This article belongs to the Special Issue Ultrasonic Sensing Technologies)
Stiffened structure-induced gain-phase errors degrade the performance of the high-resolution two-dimensional multiple signal classification (2D-MUSIC) algorithm, which makes it impossible to ensure the high accuracy of impact localization results. To eliminate the localization bias caused by these errors, a calibrated 2D-MUSIC-based impact localization method is first introduced. Firstly, time-frequency characteristics of the non-stationary impact signals are evaluated by experiment to obtain a clear first wave packet or a wave packet that purely corresponds to a single mode through continuous wavelet transform (CWT). Then, the uniform linear array covariance matrix with gain-phase errors is calibrated to be constructed as a Toeplitz structural matrix. By reconstructing covariance matrix R, 2D-MUSIC-based impact localization is calibrated for stiffened curved composite structures. Experimental research on the stiffened curved composite panel is carried out, and these impact localization results demonstrate the validity and effectiveness of the calibrated 2D-MUSIC-based method. View Full-Text
Keywords: stiffened curved panels; piezoelectric sensor array; calibrated 2D-MUSIC; impact localization stiffened curved panels; piezoelectric sensor array; calibrated 2D-MUSIC; impact localization
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MDPI and ACS Style

Wang, Z.; Zhou, J.; Zhong, Y.; Li, C. Gain-Phase Error-Calibrated Piezoelectric Sensor Array-Based Impact Localization on Stiffened Curved Composite Structures. Sensors 2022, 22, 5879. https://doi.org/10.3390/s22155879

AMA Style

Wang Z, Zhou J, Zhong Y, Li C. Gain-Phase Error-Calibrated Piezoelectric Sensor Array-Based Impact Localization on Stiffened Curved Composite Structures. Sensors. 2022; 22(15):5879. https://doi.org/10.3390/s22155879

Chicago/Turabian Style

Wang, Zhiling, Jinyu Zhou, Yongteng Zhong, and Chaoyue Li. 2022. "Gain-Phase Error-Calibrated Piezoelectric Sensor Array-Based Impact Localization on Stiffened Curved Composite Structures" Sensors 22, no. 15: 5879. https://doi.org/10.3390/s22155879

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