Digital Signal Processing Reference
In-Depth Information
0.5
0
-0.5
0
2
4
6
8
10
12
14
Time (sec.)
0.02
Meshing frequency
0.01
0
0
1000
2000
3000
4000
5000
6000
7000
Frequency (Hz)
0.02
Sideband frequency f
m
-f
i
Meshing frequency
0.01
0
250
260
270
280
290
300
310
320
330
340
350
Zoomed Frequency (Hz)
FIGURE 4.28
Vibration signal and spectrum from the good condition gearbox.
(Data provided by SpectaQuest, Inc.)
1
0
-1
0
2
4
6
8
10
12
14
Time (sec.)
0.02
Meshing frequency
0.01
0
0
1000
2000
3000
4000
5000
6000
7000
Frequency (Hz)
Meshing frequency
0.02
Sidebands
Sidebands
0.01
0
250
260
270
280
290
300
310
320
330
340
350
Zoomed Frequency (Hz)
FIGURE 4.29
Vibration signal and spectrum for damage severity level 1.
(Data provided by SpectaQuest, Inc.)
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