Complexity Analysis of Time-Frequency Features for Vibration Signals of Rolling Bearings Based on Local Frequency

Table 2

The LZC features of the time-domain signal for the rolling bearing at different speeds.

Rotation speed (r/min)	Normal	Inner ring fault	Outer ring fault	Rolling element fault
1797	0.1503	0.2089	0.0968	0.2879
1772	0.1962	0.2013	0.1655	0.2953
1750	0.2017	0.1936	0.2885	0.3032
1730	0.2115	0.1860	0.3614	0.3236