Lateral-Torsional Coupling Characteristics of a Two-Stage Planetary Gear Rotor System

Table 1

Essential parameters of the two-stage planetary gear subsystem.

(a)

Stage	component	Mass (kg)	Base radius (m)	I (kg·m^2)
First-stage	carrier	8.346	0.064	0.0332
	ring	9.423	0.095	0.1525
	sun	0.790	0.024	0.0002
	planet	0.620	0.035	0.0007
Second-stage	carrier	30.000	0.086	0.1554
	ring	25.000	0.120	0.6780
	sun	3.765	0.041	0.0026
	planet	1.360	0.039	0.0017

(b)

Stage	Pressure angle (°)	Mesh stiffness; (N/m)	Bearing stiffness; (N/m)	Torsional Stiffness; (N·m/rad)
First-stage	20
Second-stage