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

Table 4

Comparison of simulation and modal experiment.

Mode of vibration	Prediction natural frequency	Experiment natural frequency	Relative error
Axial	-	-	-
Low-order torsion	48.4 Hz	51.7 Hz	6.3%
Axial and torsion	147.5 Hz	136.2 Hz	8.3%
Pitch	317.2 Hz	284.4 Hz	11.5%
Pitch and torsion	341.6 Hz	302.2 Hz	13.0%