356
M. Fenchea
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
0.04
0.05
0
0.05
0.1
0.15
0.2
Temp (s)
Amplitude
Fig. 4 Signal in the time domain. Hammer set 1
100
200
300
400
500
600
700
800
0
0.005
0.01
0.015
0.02
0.025
Amplitude
Frequency (Hz)
Fig. 5 Frequency spectrum. Hammer set 1
The vibration measurements show that when the parameters that show the value
of percussion centre have great value (15,7411 mm), the signals in the frequency
domain are great and when the parameters that show the value of percussion centre
have small value (19,290 mm), the signal in the frequency domain are small. This
fact puts in direct correspondence the dependence between percussion centre of the
hammer and the uniformity of rotor movement.