After establishing the mathematical model of the dynamic performance of the multi-stage gear transmission system, the dynamic performance simulation model of the multi-stage gear transmission system can be realized by using the Simulink component. The simulation model is shown in Figure 1.

For the dynamic performance of multi-stage gear transmission system, the simulation model is established, and then the simulation analysis is carried out to determine the main physical parameters of the transmission system, and the influence law on the performance of the whole system is obtained.

The results show that the total transmission ratio i = 80, the flexspline deformation wave number u = 2, the number of steel teeth Z2 = 162, the number of flexible teeth Z1 = 160, the input shaft speed FH = 9500r / min, the engagement angle α n = 20 °, the rated load 60N · M, the input moment of inertia J1 = 0.00022kga · m2, the output moment of inertia J0 = 0.2839kg · m2, 0 is the initial condition. After various tests, the expressions of torsional stiffness can be obtained, and the backlash between teeth is 2 φ I = 8 ′.

After setting the simulation parameters, the above parameters are simulated and analyzed to get the influence law of these parameters on the performance of the transmission system.