HMM-Based Method for Aircraft Environmental Control System Turbofan Rolling Bearing Fault Diagnosis

Table 1

Recognition result of temperature rising state.

Sequence	1	2	3	4	5	6
Normal status	−83.5185	−92.1298	−90.8108	−84.8107	−93.3492	−84.8745
Failure status	−75.6440	−78.4925	−76.6744	−76.7286	−76.3240	−78.6024
Difference	7.8745	13.6373	14.1364	8.0821	17.0252	6.2720