Identification of Damping in Mdof Systems Using Time-Scale Decomposition

A method of damping identification in multi-degree-of-freedom systems is presented. The method is based on the time-scale decomposition of the system impulse response. The continuous wavelet transform is used to decompose the impulse response into the time-scale domain. Three techniques based on the wavelet tranform are used to estimate damping. These are the wavelet transform cross-section procedure, the impulse response recovery procedure based on wavelet domain filtering and the wavelet ridge detection procedure. The methods are applied to simulated multi-degree-of-freedom systems.