Physics-Informed Single Atom Matching Pursuit: Guided-Waves Wavenumbers and Propagation Distance Estimation for Damage Localization in Structural Health Monitoring

Structural Health Monitoring (SHM) systems utilize Guided-waves (GWs) for their exceptional sensitivity in detecting damage and assessing aging effects within thin-walled engineering components. A primary challenge in conventional GW-based SHM methodologies stems from the simultaneous excitation of multiple dispersive GW modes by a single piezoelectric transducer. This phenomenon significantly complicates signal interpretation, thereby impeding accurate damage monitoring and localization. To overcome this limitation, this work proposes the Physics-Informed Single Atom Matching Pursuit (PISAMP) method. PISAMP is a novel signal decomposition technique meticulously grounded in the fundamental physical principles governing wave propagation. In contrast to purely data-driven or computationally intensive numerical approaches, PISAMP establishes a low-dimensional and highly efficient signal representation

by embedding strong physical constraints directly into its formulation. This innovative approach facilitates the direct identification of critical, physically meaningful features from complex wave signals. Specifically, PISAMP enables the precise determination of modal wavenumber functions and the accurate estimation of propagation distances between actuators, potential damage locations, and sensors. The robust extraction of these source-damage-sensor distances is pivotal for enhancing damage localization capabilities, ultimately contributing to more reliable and effective integrity monitoring of engineering structures.

Message: Hi FE, I need help with “Physics-Informed Single Atom Matching Pursuit: Guided-Waves Wavenumbers and Propagation Distance Estimation for Damage Localization in Structural Health Monitoring” in “Aerospace Engineering”