Eccentricity Parameters Identification for a Motorized Spindle System Based on Improved Maximum Likelihood Method

Table 2

Eccentricity parameter identification procedure using improved maximum likelihood method.

No. of iterations	Method	Input parameters				Output parameters (radial displacement)
		Unknown parameter		Known parameters		Unknown parameter		Known parameters
		e1 (μm)	e2 (μm)	L (m)	D (m)	d3 (μm)	d4 (μm)	d1 (μm)	d2 (μm)
Initial 1	FEM	0	0	0.5	2.4	0	0	0	0
	SMM	0.0639	0.1676			0.0366	0.0459	0.1055	0.0735
2	ARM	0.1916	0.5027	0.5	2.4	0.1098	0.1378	0.3164	0.2205
	SMM	0.2047	0.7212			0.1174	0.1473	0.3382	0.2356
3	ARM	0.2309	1.1582	0.5	2.4	0.1325	0.1663	0.3817	0.2660
	SMM	0.2874	1.2521			0.1649	0.2069	0.4750	0.3310
…	…	…	…	…	…	…	…	…	…
979	ARM	19.9342	100.1121	0.5	2.4	11.4363	14.3565	32.9509	22.9610
	SMM	20.0208	100.5260			11.4860	14.4188	33.0941	23.0607
980	ARM	19.9342	100.1121	0.5	2.4	11.4363	14.3565	32.9509	22.9610
	SMM	19.9707	100.4100			11.4574	14.3829	33.0115	23.0032
981	ARM	19.9342	100.1121	0.5	2.4	11.4363	14.3565	32.9509	22.9610
	SMM	19.9997	100.5923			11.4740	14.4037	33.0594	23.0365
Target		20	100	0.5	2.4	11.4740	14.4037	33.0594	23.0366