Investigation of Parametric Instability of the Planetary Gear under Speed Fluctuations

Table 1

Simulation parameters of an example planetary gear with three equally spaced and in-phase planets.

Number of planets
Inertia (kg)	= 2.5, = 2.5,   = 2
Mesh stiffness (N/m)	= = 10^8
Pressure angle (degree)	= 24.6, = 20.19
Contact ratio	= 1.4, = 1.6
Circumferential angle	= ,
Sun-planet meshing phase
Ring-planet meshing phase
Natural frequencies (Hz)	, , ,
Mesh stiffness variation	, 0.05, 0.1, 0.15, 0.2, 0.25