Mechanical Systems and Signal Processing

Signal decomposition is an important task in Prognostics and Health Management (PHM) of mechanical transmission systems characterized by nonlinear and non-stationary vibration responses. However, conventional signal processing methodologies are often constrained by fixed basis functions and manual parameter tuning, which compromise noise robustness and limit their ability in capturing transient s…

Identifying the full-stress tensor over the surface of a vibrating structure is essential for design validation and vibration-fatigue-life estimation, yet current experimental methods provide only pointwise or incomplete stress data. Infrared cameras can provide non-contact, full-field surface-stress measurements on vibrating structures via the thermoelastic effect; however, they measure only the…