In order to improve the load sharing characteristics of the split torque drive system

the mechanism of affecting the load sharing performance was analyzed by constructing the analysis diagram of error and load. Considering the support stiffness

the torsional stiffness and time-varying meshing stiffness of the gear pairs

a dynamic model of the transmission system was established by using the lumped mass method. The dynamic model of the transmission system was solved by the Runge Kutta method

and the load sharing coefficient was calculated. The influence law and weight of backlash and center distance error on the load sharing characteristics were obtained by the orthogonal test method. The results showed that the backlash had correlation

and its value should meet certain rules; the center distance error had no correlation

and the center distance error of confluence stage had great influence on the load sharing and dynamic load coefficient. Therefore

in order to improve the load sharing characteristics of the split torque transmission

the design method of parameter matching should be adopted for the backlash and center distance errors.