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

Table 1

Physical parameters of the dual-driving system.

Name	Value	Description
	7.53 kg	Mass of the axis
	7.61 kg	Mass of the axis
	510 kg	Mass of the sliding stage
	78 kg·m^2	Rotary inertia of the stage
	51 kg·m^2	Pitch inertia of the stage
	1631.8 N·m/rad	Equivalent stiffness of screw
	1572.5 N·m/rad	Support stiffness of slider
	2.67346 N·m/rad	Lateral stiffness of slider
L	0.8 m	Distance of dual screws
a	0.45 m	Axial distance of the sliders
	5 mm	Screw lead
	117.7352 N	Maximum static friction of
	102.1365 N	Maximum static friction of
	30.2017 N	Coulomb friction of axis
	26.8520 N	Coulomb friction of axis
	0.0052 Ns/m	Viscosity coefficient of axis
	0.0060 Ns/m	Viscosity coefficient of axis
	73.2533 mm/min	Stribeck velocity of axis
	109.3258 mm/min	Stribeck velocity of axis