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. 2024 Nov 25;17(23):5783. doi: 10.3390/ma17235783

Table 2.

Measures taken into account in training diagnostic models.

Symbol Description Frequency Band
1 ax_rms_(1000.0, 2500.0) Rms value of vibration acceleration 1.0–2.5 kHz
2 ax_rms_(7000.0, 8000.0) Rms value of vibration acceleration 7.0–8.0 kHz
3 ax_mean_peak Average peak value of vibration accelerations Full
4 ax_CF Crest factor of the vibration acceleration signal
5 ax_FF Form factor of the vibration acceleration signal
6 ax_f.Ricea Rice frequency
7 ay_rms_(1500.0, 2500.0) Rms value of vibration acceleration 1.5–2.5 kHz
8 ay_rms_(3000.0, 3500.0) Rms value of vibration acceleration 3.0–3.5 kHz
9 ay_rms_(7500.0, 8000.0) Rms value of vibration acceleration 7.5–8.0 kHz
10 ay_rms_(11,000.0, 11,500.0) Rms value of vibration acceleration 11.0–11.5 kHz
11 ay_mean_peak Average peak value of vibration accelerations Full
12 ay_avg Average value of the vibration acceleration signal
13 ay_CF Crest factor of the vibration acceleration signal
14 ay_FF Form factor of the vibration acceleration signal
15 ay_IF Impulse factor for vibration acceleration
16 ay_kurt Vibration acceleration kurtosis
17 az_mean_peak Average peak value of vibration accelerations Full
18 az_avg Average value of the vibration acceleration signal
19 az_CF Crest factor of the vibration acceleration signal
20 az_FF Form factor of the vibration acceleration signal
21 az_IF Impulse factor for vibration acceleration
22 az_kurt, Vibration acceleration kurtosis
23 az_f.Ricea Rice frequency
24 Fy_rms Effective value of the dynamic component of the force Full
25 Fy_mean_peak Average peak force
26 Fy_avg Average value of the force signal
27 Fy_amp_sqrt The root amplitude of the force signal
28 Fy_CF Crest factor of the force signal
29 Fy_FF Form factor of the force signal
30 Fz_rms Effective value of the dynamic component of the force Full
31 Fz_mean_peak Average peak force
32 Fz_avg Average value of the force signal
33 Fz_CF Crest factor of the force signal
34 Fz_FF Form factor of the force signal
35 vc Cutting speed -