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

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 e...

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Published inSensors (Basel, Switzerland) Vol. 22; no. 15; p. 5879
Main Authors Wang, Zhiling, Zhou, Jinyu, Zhong, Yongteng, Li, Chaoyue
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 05.08.2022
MDPI
Subjects
Acoustics
Aircraft
Algorithms
calibrated 2D-MUSIC
Calibration
Composite structures
Continuous wavelet transform
Covariance matrix
Curved panels
Experiments
impact localization
Linear arrays
Localization
Localization method
Music
Phase error
piezoelectric sensor array
Propagation
Sensor arrays
Sensors
stiffened curved panels
Wave packets
Wavelet transforms
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Abstract 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.
AbstractList 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.
Author Zhou, Jinyu
Zhong, Yongteng
Li, Chaoyue
Wang, Zhiling
AuthorAffiliation 2 College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325035, China
1 School of Mechanical and Electrical Engineering, Jinling Institute of Technology, Nanjing 211169, China
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Snippet Stiffened structure-induced gain-phase errors degrade the performance of the high-resolution two-dimensional multiple signal classification (2D-MUSIC)...
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SubjectTerms Acoustics
Aircraft
Algorithms
calibrated 2D-MUSIC
Calibration
Composite structures
Continuous wavelet transform
Covariance matrix
Curved panels
Experiments
impact localization
Linear arrays
Localization
Localization method
Music
Phase error
piezoelectric sensor array
Propagation
Sensor arrays
Sensors
stiffened curved panels
Wave packets
Wavelet transforms
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Title Gain-Phase Error-Calibrated Piezoelectric Sensor Array-Based Impact Localization on Stiffened Curved Composite Structures
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