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This paper discusses a specific technique for frequency tone detection. Based on a modified DFT series equation, the algorithm provides to enlarge a portion of spectrum of the acquired signal. It starts from an arbitrary point and length, and then individuates the fine peak position. After the theory description, the implemented algorithm is described. Finally, the results confirm the performances...
In this paper we present a method for reconstructing the true harmonic composition of power quality indices, such as voltages and currents in cases when the actual fundamental frequency in a power grid differs from its nominal value. We have shown that even if an instrument incorrectly assumes the fundamental frequency to be equal to the nominal value, it is still possible to use the measurement results...
In the paper a procedure for real-time detection of low frequencies is proposed, and it is customized for detecting very low frequency and slightly higher frequency components. The case study is focused on the observation of a Magnetorheological suspension system installed on a commercial motorbike: the resonance frequencies due to the sprung mass and due to the unsprung masses are monitored. Tests...
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