Research on Microvibrations Generated by a Control Moment Gyroscope on a Flexible Interface Based on a Dynamic Substructure Method

Table 4

Simulation parameters of the coupling system.

Symbol	Description	Value	Unit
mf	Mass of the flywheel	8	kg
Jfr	Radial inertia of the flywheel	0.02	kg·m^2
Jfz	Polar inertia of the flywheel	0.03	kg·m^2
mg	Mass of the gimbal	10	kg
Jgr	Radial inertia of the gimbal	0.06	kg·m^2
Jgz	Polar inertia of the gimbal	0.09	kg·m^2
mb	Mass of the bracket	14	kg
Jbr	Radial inertia of the bracket	0.1	kg·m^2
Jbz	Polar inertia of the bracket	0.2	kg·m^2
kr0	Radial stiffness of the flywheel bearing	4 × 10^6	N/m
ka0	Axial stiffness of the flywheel bearing	2 × 10^7	N/m
cr0	Radial damping of the flywheel bearing	2000	N·s/m
ca0	Axial damping of the flywheel bearing	3000	N·s/m
kr1	Radial stiffness of the gimbal bearing	8 × 10^6	N/m
ka1	Axial stiffness of the gimbal bearing	4 × 10^7	N/m
cr1	Radial damping of the gimbal bearing	2000	N·s/m
ca1	Axial damping of the gimbal bearing	3000	N·s/m
ks	Servo dynamic stiffness of the servo system	8 × 10^6	N·m/rad
d0	Distance from origin o1 to the flywheel bearing	0.04	m
d1	Distance from origin o2 to the gimbal bearing	0.055	m
h	Distance between connection coordinates c1 and o1	0.06	m
Us	Static mass imbalances	3.6 × 10^−6	kg·m
Ud	Dynamic mass imbalances	7.02 × 10^−8	kg·m^2
φs	Initial phase of the static mass imbalance	0	rad
φd	Initial phase of the dynamic mass imbalance	0	rad
Ω	Rotating speed of the flywheel	200π	rad/s