Bearing fault diagnosis under variable rotational speed via the joint application of windowed fractal dimension transform and generalized demodulation: A method free from prefiltering and resampling
Windowed FD transform is reported for envelope extraction without prefiltering. A resampling-free method is proposed for analyzing signals of variable frequency. The resampling-free order spectrum is obtained for bearing condition diagnosis. The method is evaluated by numerical simulated and experimental data.
bearing fault diagnosis variable rotational speed windowed fractal dimension transform generalized demodulation resampling-free order spectrum