Fault Diagnosis of Wheel Flat Using Empirical Mode Decomposition-Hilbert Envelope Spectrum

<div>Hilbert envelope spectrum based on EMD with dual flat in different speeds (phase difference=180°). (a) Hilbert envelope spectrum of IMF1 with different vehicle speeds. (b) The sum of Hilbert envelope spectrum of IMF1-IMF3 with different vehicle speeds.</div>

Mathematical Problems in Engineering

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Figure 13

Figure 13: Fault Diagnosis of Wheel Flat Using Empirical Mode Decomposition-Hilbert Envelope Spectrum 