Results of impedance measurements of a non-stationary model electric system
are presented. Impedance measurements were realised by the pseudo-white no
ise technique. Simultaneous time-frequency analysis of the response signal
was performed using the short-time Fourier transformation method. It is sho
wn that the measurement method correctly reflects changes of the system inv
estigated in the time and frequency domains. (C) 2000 Elsevier Science S.A.
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