The Instantaneous Frequency Estimation In Rotating Machinery
نویسندگان
چکیده
Stages of run-up or run-down of rotating machinery are unstable random process. The methods of time-frequency analysis, such as short time Fourier transform, wavelet transform and so on, will be employed to analyze the relevant test signals. To obtain the laws of the instantaneous frequency of multi-component signals during the run-up or run-down periods, the method based on peak search is widely used. However, the direct search cannot assure accuracy and precision of the results because of the interference of strong noise and adjacent components of the signal. In this paper, the Hidden Markov Models are used to solve the problem. Simulation indicated that better results can be achieved by the method based on HMM.
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