Complex-frequency excitations increase Fisher information and improve natural frequency estimation accuracy in underdamped SDOF systems compared to harmonic excitations under Gaussian noise.
Stochastic finite element method for random harmonic analysis of composite plates with uncertain modal damping parameters.Journal of Sound and Vibration, 400:1–12, 2017
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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.