Unbalance Identification of Speed-Variant Rotary Machinery without Phase Angle Measurement

Table 6

Correction masses recognition for turbine rotor at 7800 r.p.m.

Position	Run tests utilized	Correction masses
		Individual (g, °)	Mean value (g, °)	Percentage error (%, %)
Node 4	2, 3, 4	0.4755, 232.4	0.5112, 220.4	46.1, 46.9
	3, 4, 5	0.5464, 196.1
	2, 4, 5	0.5118, 232.6
Node 5	2, 3, 4	0.4573, 175.3	0.4695, 182.4	34.1, 21.6
	3, 4, 5	0.4658, 182.6
	2, 4, 5	0.4855, 189.4
Node 6	2, 3, 4	0.5485, 206.3	0.5520, 193.4	57.7, 28.9
	3, 4, 5	0.5239, 198.6
	2, 4, 5	0.5836, 175.3