Damping estimation via energy-dissipation method

摘要: This paper extends an existing single-degree-of-freedom (dof) energy-dissipation scheme to identify damping parameters for multiple-dof vibration systems. The method balances the energy input of real system against dissipated in a theoretical model develop identification algorithms. friction is assumed consist viscous and Coulomb components. proposed algorithms are applicable general- periodic-input cases. According numerical studies performed on periodic excitation, mixed-frequency harmonic preferable single-frequency one. Moreover, when noise present measurements, increasing length integration interval can be remedy effects estimation accuracy. Observations made study also indicate that results obtained from band-limited white-noise more accurate than those Such excitations adopted experimental which electrical investigated. further confirm validity reliability method.