A denoising procedure using wavelet packets for instantaneous detection of pantograph oscillations

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This paper presents a robust online denoising algorithm for use in the online, instantaneous detection of changing harmonic signals. This algorithm uses a classical time correlation function (scalar product). For instantaneous frequency detection, a short window is considered. It is known that cleaned signals are required to determine the correct correlation between short signals. The measured signal is cleaned by the proposed noise removal algorithm, which uses wavelet packets. The proposed cleaning method avoids classical thresholding techniques. Computer simulations that validate the procedure are shown.
Original languageEnglish
JournalMechanical Systems and Signal Processing
Issue number1-2
Pages (from-to)137-149
Number of pages13
Publication statusPublished - 02.2013

    Research areas

  • Engineering - Noise detection, Oscillation detection, Pantograph control, Wavelets