Complex-frequency excitations increase Fisher information and improve natural frequency estimation accuracy in underdamped SDOF systems compared to harmonic excitations under Gaussian noise.
Review on the new development of vibration-based damage identification for civil engineering structures: 2010–2019.Journal of Sound and Vibration, 491:115741, 2021
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Natural frequency estimation using complex-frequency excitations
Complex-frequency excitations increase Fisher information and improve natural frequency estimation accuracy in underdamped SDOF systems compared to harmonic excitations under Gaussian noise.