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In this paper, a novel fault diagnosis technique is developed for permanent magnet synchronous motors (PMSM) using discrete wavelet transform and support vector machines based on stators current waveform. An adaptive filtering scheme is developed to remove the fundamental component of the current waveform in order to increase the accuracy of fault diagnosis. For this purpose, the instant rotational...
A novel working angle recognition system of screw compressor valve using wavelets and Probabilistic Neural Networks for engineering application is proposed. According to tested valve vibration signal energy changing characteristic under different working angle of valve flake, the paper obtains vibration signal power distribution on different scales using continuous wavelet transform, that is, scale-wavelet...
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