A Review of Key Signal Processing Techniques for Structural Health Monitoring: Highlighting Non-Parametric Time-Frequency Analysis, Adaptive Decomposition, and Deconvolution

This paper reviews key signal processing techniques in Structural Health Monitoring (SHM), focusing on non-parametric time-frequency analysis, adaptive decomposition, and deconvolution methods. It examines the Short-Time Fourier Transform (STFT), Wavelet Transform (WT), and Wigner-Ville Distribution (WVD), highlighting their applications, advantages, and limitations in SHM. The review also explores adaptive techniques like Empirical Mode Decomposition (EMD) and its variants (EEMD, MEEMD), as well as Variational Mode Decomposition (VMD) and its improved versions (SVMD, AVMD), emphasizing their effectiveness in handling nonlinear and non-stationary signals. Additionally, deconvolution methods such as Minimum Entropy Deconvolution (MED) and Maximum Correlated Kurtosis Deconvolution (MCKD) are discussed for mechanical fault diagnosis. The paper aims to provide a comprehensive overview of these techniques, offering insights for future research in SHM signal processing.