Mass Laplacian Discriminant Analysis and Its Application in Gear Fault Diagnosis

Table 2

Data sampling strategy for different fault levels on four states.

Fault status	Data grouping strategy based on working conditions
Normal gear	240 sets of data (3 sensor signals × 80 sampling periods)
Pinion pitting	60 groups (1 pitting pit)	60 groups (2 pitting pits)	60 groups (3 pitting pits)	60 groups (4 pitting pits)
Large gear broken teeth	48 groups (1/5 broken)	48 groups (2/5 broken)	48 groups (3/5 broken)	48 groups (4/5 broken)	48 groups (all broken)
Large gear broken + pitting	48 groups (1/5 broken + 1 pitting pit)	48 groups (2/5 broken + 2 pitting pits)	48 groups (l 3/5 broken + 3 pitting pits)	48 groups (4/5 broken + 4 pitting pits)	48 groups (all broken + 4 pitting pits)