2021
DOI: 10.21595/jve.2021.21855
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Amplitude and frequency estimator for aperiodic multi-frequency noisy vibration signals of a tram gearbox

Abstract: Sinusoidal parameter estimation for determining frequency position and amplitude is challenging for noisy short vibration signals, e.g. from machines or human vibrations. In this paper, we propose the "Trimmed Window Discrete Fourier Transform" (TWDFT) estimator, which uses for every frequency a one-point discrete Fourier transform (DFT) to determine the corresponding spectral amplitude. To avoid leakage effects, it cuts the time interval so that it corresponds to an integer number of period durations. To eval… Show more

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