Dynamic Load Sharing Behaviours of Planetary Gear Trains and Parameter Study through Perturbation Analysis

Table 1

System parameters of the example PGTs.

Parameters	Values
No. of planets, N	3 ∼ 6
Support stiffness of sun gear (N/m)	1e10 (fixed), 1e6 (float)
Mean s-p mesh stiffness (N/m)	0.62e9
Mean r-p mesh stiffness (N/m)	0.85e9
First harmonic of s-p mesh stiffness (N/m)	0.14e9
First harmonic of r-p mesh stiffness (N/m)	0.11e9
s-p, r-p mesh phasing angle	0
Pressure angle (deg)	22.5
Input torque to sun, Ts (Nm)	1130
Sun inertia (kg)	6.21
Planet inertia (kg)	4.89
Damping ratio	0.02
Tooth number of sun gear in 5-planet system	34
Tooth number of planet gear in 5-planet system	31
Tooth number of ring in 5-planet system	96
Module (mm)	4
Face width (mm)	40