... learning platform design engineering damage identification method vibration response signal nonlinear damage identification measuring point relative damage function coherence analysis response signal detection coherence function damage identification identification vibration signal...

... signals are an important indicator representing equipment condition. One of the principal tools for diagnosing rotating machinery problems is the vibration analysis. Equipment generates vibration signals containing a specific pattern in both normal state and the abnormally deteriorated state and indicates...

... sensor was installed at the outside of pipeline to receive sand signals. Then vibration signals generated by sandy impacting were preprocessed through time-frequency domain analysis in theory. By laboratory experiments, the relationship between sand monitoring signal and sanding parameters were...

... under mild environment. Field measurements were performed and vibration signals at different locations were recorded. Empirical mode decomposition (EMD) was applied to acquire the intrinsic mode functions (IMF). Then Hilbert-Huang transform (HHT) was used to compute the time-frequency distribution...

... health synthesized wigner-ville distribution acceleration vibration signal vibration signal wigner-ville distribution time-frequency map structural damage detection empirical mode decomposition data quality sensor subsea system imf natural frequency frequency upstream oil & gas...