Dynamic Characteristics Analysis and Test of Dual-Driving Feed System Driven by Center of Gravity

Table 3

Natural frequencies and modes of vibration.

Eigenvalue	Natural frequency	Vector	Mode of vibration
	0 Hz		Axial
	48.4 Hz		Low-order torsion
	147.5 Hz		Axial and torsion
	317.2 Hz		High-order torsion
	341.6 Hz		Pitch and torsion