Orthonormal Wavelets for System Identification

A new scheme of non-parametric identification method based on orthonormal wavelets for structures with multicoupled modes is developed and presented in this paper. The advantages of using Wavelets for system identification are that good localization and hierarchical multiresolution can be achieved in both time and frequency domains. Consequently, the system model with multiple coupled modes can be identified (by wavelet based identification techniques) more efficiently and accurately, especially for wideband (transient) and nonstationary signals. Results from the simulation case studies and modeling of a lo-story reinforced concrete building under earthquake loading show excellent promise for the system identification in the Wavelet domain.