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The Hilbert-Huang Transform (HHT) consists of the following steps: First, decomposition of time sequenced data by empirical modes (EMD), followed by a Hilbert transform to obtain a new method of spectrum treatment. The theory and algorithm of the HHT is explained and an experiment of oil film instability (oil whirl and oil whip) simulated on rotor kit, the full process of oil whirl occurrence, development...
Vibration problems in rotors can be extremely frustrating and may lead to greatly reduced reliability. By utilizing the proper data collection and analysis techniques, the faults because of vibration can be discovered and predicted. The time-frequency analysis by Hilbert-Huang transform (HHT) plays on a significant role in the analysis of singularities, which hide in the signal, and is an effective...
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