Published: 31 March 2012

Time-varying systems identification using continuous wavelet analysis of free decay response signals

X. Xu1
Z. Y. Shi2
S. L. Long3
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This paper proposes a time-varying approach used for identification of time-varying systems and presents a simulation example of a simple vibration system with time-varying mass, stiffness and damping characteristics, which is a five-storey shear-beam building model. Free decay acceleration response signals are analyzed to reveal time-varying nature of the system. Wavelet analysis is used for system identification. The method is based on a recently developed direct identification algorithm. Numerical results confirm that the proposed method is accurate and effective in identification of the time-varying system.

About this article

15 December 2011
14 February 2012
31 March 2012
parameter identification
continuous wavelet
free decay response signals
instantaneous frequencies