Inalpolat and Kahraman  predicted modulation sidebands of a simple-stage planetary gear train
by introducing the influence of manufacturing errors on the gear transmission error excitations into a nonlinear time-variant dynamic model.
Tsai, "Computer-aided sketching of epicyclic-type automatic transmission gear trains
," Journal of Mechanical Design, vol.
Cui, "Analysis of the torsional characteristics of planetary gear trains
of an increasing gearbox," Mechanical Science and Technology For Aerospace Engineering, vol.
are one of the oldest known machines, and none is more closely identified by the general public with the profession of mechanical engineering.
These movements require the highly-specialised production and adjustment techniques of perfectly-made miniature components, such as wheels and gear trains
* Direct drive motor technology (no brushes or gear trains
) provides quicker acceleration and higher max Speeds than gear or belt-driven mechanisms.
are widely used in various means of transport, including air, rail and road transport.
Planetary gear trains
, also referred as epicyclic gear trains
, are those in which one or more gears orbit about the central axis of the train.
The author provides detailed drawings and illustrations that document nearly every part of the clock such as the sun-moon dial, the gear trains
, the calendar hand, the equation-of-time indicator, the strike operation, the music train and the settings for dial indicators.
* the gear trains
will be replaced with chain transmissions: one on the back which doubles the speed, and one on the front which ensures a proper angle for the universal joints used at the rotating head (Dumitru, 2008);
British science historian Derek de Solla Price showed in 1974 that the mechanism's gear trains
could replicate the motions of the Sun and Moon through the zodiac.
* New gear constraints for modeling abstract gear trains