Spatial Information Entropy and Its Application in the Degradation State Identification of Hydraulic Pump

Table 5

Clustering centers of loose boot feature set.

Degradation features	Loose degree (mm)
	Normal	0.12	0.18	0.3	0.42	0.64
PE	0.9974	0.9966	0.9953	0.9886	0.9842	0.9549
SIE	0.289	0.2656	0.2346	0.1938	0.15	0.0951