Time-varying frequency-shifting signal-assisted empirical mode decomposition method for AM–FM signals

2009 ◽  
Vol 23 (8) ◽  
pp. 2458-2469 ◽  
Author(s):  
Xu Guanlei ◽  
Wang Xiaotong ◽  
Xu Xiaogang
Keyword(s):  
Empirical Mode Decomposition ◽  
Decomposition Method ◽  
Time Varying ◽  
Mode Decomposition ◽  
Fm Signals ◽  
Time Varying Frequency ◽  
Empirical Mode Decomposition Method ◽  
Frequency Shifting

Identification of Linear Time-Varying Dynamical Systems Using Hilbert Transform and Empirical Mode Decomposition Method

2006 ◽  
Vol 74 (2) ◽  
pp. 223-230 ◽  
Author(s):  
Z. Y. Shi ◽  
S. S. Law
Keyword(s):  
Dynamical Systems ◽  
Empirical Mode Decomposition ◽  
Hilbert Transform ◽  
Decomposition Method ◽  
Degrees Of Freedom ◽  
Linear Time ◽  
Time Varying ◽  
Mode Decomposition ◽  
Empirical Mode Decomposition Method ◽  
The Hilbert Transform

This paper addresses the identification of linear time-varying multi-degrees-of-freedom systems. The identification approach is based on the Hilbert transform and the empirical mode decomposition method with free vibration response signals. Three-different types of time-varying systems, i.e., smoothly varying, periodically varying, and abruptly varying stiffness and damping of a linear time-varying system, are studied. Numerical simulations demonstrate the effectiveness and accuracy of the proposed method with single- and multi-degrees-of-freedom dynamical systems.

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