In the research of planetary gear transmission system, the module selection range is usually 1-50 mm. Because the small module gear has the advantages of small structure size, high grid accuracy, fast calculation speed, etc., when the module is 1 mm, it is more consistent with the experimental platform and improves the practicality of the model.
| Parameter name | Sun wheel | Planetary gear | Ring gear |
| Moment of inertia/(kg ∙ m2) | 4.7×10^-4 | 1.21×10^-3 | 1.413×10^-1 |
| Number of teeth | 28 | 36 | 100 |
| Modulus/mm | 1 | 1 | 1 |
| Pressure angle/(°) | 20 | 20 | 20 |
| Tooth width/mm | 10 | 10 | 10 |
| Mass/g | 35.6 | 54.4 | 423 |
In view of the fact that spur gear transmission is more stable than helical gear transmission, that is, there is no axial force in the transmission process, so this paper uses standard spur gear parameter modeling. The basic parameters of the planetary gear transmission system are shown in Table 1 and Table 2.
| Inner ring diameter/mm | Outer ring diameter/mm | Pitch diameter/mm | Width/mm | Mass/g | Rated dynamic load/N |
| 14 | 20 | 17 | 10 | 8.3 | 6700 |