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

fYear

1998

Firstpage

445

Lastpage

448

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/TFSA.1998.721457

Filename

721457