Seminar Details
2011-05-03 (15.00) : A frequency domain approach to the identification of time-varying systems
At Euler building
Organized by Mathematical Engineering
Speaker :
John LATAIRE (VUB)
Abstract :
A time-varying system is a system whose dynamic behaviour changes with time.
As an example consider a swinging mass, attached to a rod with a varying length. As this rod shortens, the speed of oscillation increases,
yielding a time-varying resonance frequency. Most existing identification tools for time-varying systems have been formulated in the time domain.
The present research investigates how a frequency domain formulation could be beneficial for the identification of LTV (Linear Time-Varying) systems.
It turns out that, when using multisine excitations, a lot of insight on the evolution of the instantaneous dynamics can be extracted from a
simple inspection of the spectral response of the system. This will be elucidated during the presentation