Multistep Degradation Tendency Prediction for Aircraft Engines Based on CEEMDAN Permutation Entropy and Improved Grey–Markov Model

Table 1

Six different operation states.

State	Setting parameter 1	Setting parameter 2	Setting parameter 3
1	0	0	100
2	10	0.25	20
3	20	0.7	0
4	25	0.62	80
5	35	0.84	60
6	42	0.84	40