Optimal Cost-Effective Maintenance Policy for a Helicopter Gearbox Early Fault Detection under Varying Load

Table 3

Model parameters estimation with EM algorithm using different initial values.

Parameters	Initial values	First iteration	Second iteration	Last iteration
	0.5	0.3176	0.8920	1.0000
	0.5	0.6824	0.1080
	5	3	3	2
	5	2	2	2
	0.3	0.2663	0.2199	0.2070
	—	−1.98	−1.53	−1.32