The Wigner-Ville distribution in the analysis of deterministic components of spontaneous oscillations

The Wigner-Ville distribution (WVD) method has been applied for the analysi s of spontaneous oscillations of the anodic copper dissolution process. The nonstationary character of the investigated process has been shown. The ob served current oscillations contain deterministic components not revealed i n the classic Fourier spectrogram. The WVD spectrogram allows the identific ation of frequency bands of spontaneous oscillations. The observed determin istic components take the form of frequency bands, dependent on time. The m ain disadvantage of this type of analysis is the formation of the so-called cross-terms, which are oscillatory in character. However, it was shown tha t it is possible to reduce them significantly by a low-pass filtration.