Research on Multidomain Fault Diagnosis of Large Wind Turbines under Complex Environment

Table 2

Frequency domain characteristic parameters of vibration signal.

Number	Characteristic expression
1
2
3
4
5
6
7
8
9
10
11
12
13

In the equations in Table 2, represents the spectral line of , is the total number of spectral lines, and is the frequency value of the th spectrum line.