Feature Extraction Using Discrete Wavelet Transform for Gear Fault Diagnosis of Wind Turbine Gearbox

Table 1

Signals of interest and used CIs.

Signals type	Name of signal	Used CIs
TSA	TSA	RMS, nRMS, P2P, CF, SKW, KURT, DA1, EO, FM0, SLF, SI, ASB, and NB4
Residual TSA	resTSA	NA4, NA4
Difference TSA	diffTSA	ER, FM4, FM4, M6A, M8A, DiffDA1, and DiffP2P