Title :
Time-frequency and cross-time-frequency based techniques for the structural identification of systems
Author :
Bonato, Paolo ; Ceravolo, Rosario ; De Stefano, Alessandro ; Molinari, Filippo
Author_Institution :
NMRC, Boston Univ., MA, USA
Abstract :
We propose a new method for the structural identification of systems based on the time-frequency (TF) and the cross-time-frequency (XTF) distributions of the accelerometric signals recorded from the system during its normal service condition. By means of the technique proposed it is possible to extract the modal parameters of the system in an unequivocal manner. The performance of the method were tested by using numerical simulations of a linear system and an input constituted by a “sine sweep” excitation
Keywords :
acceleration; acoustic signal processing; damping; dynamic testing; numerical analysis; parameter estimation; signal representation; structural engineering; time-frequency analysis; accelerometric signals; amplitude ratio; cross-time-frequency distribution; damping ratio; environmental excitation; linear system; modal parameters; multicomponent input signals; normal service condition; numerical simulations; performance; phase ratio; signal representation; sine sweep excitation; structural identification; system identification; three-story shear-type frame; time-frequency distribution; vibrations; Amplitude estimation; Amplitude modulation; Damping; Linear systems; Numerical simulation; Phase estimation; Signal analysis; Signal processing; System testing; Time frequency analysis;
Conference_Titel :
Time-Frequency and Time-Scale Analysis, 1998. Proceedings of the IEEE-SP International Symposium on
Conference_Location :
Pittsburgh, PA
Print_ISBN :
0-7803-5073-1
DOI :
10.1109/TFSA.1998.721457
