Model and Characteristic Simulation Analysis of a Two-Speed Transmission System

Abstract

One of the main tasks in the research of a helicopter two-speed transmission system was to improve its dynamic characteristics. For the low gear mode of the system, a dynamic model was established by using the lumped parameter method, the method of Runge-Kutta was used to solve the nonlinear dynamic system equations. The effect of the gear module on the dynamic transmission error, dynamic load of the gear pair and the dynamic windup angle of a one-way clutch were studied. And the effect of the one-way clutch torsional stiffness on the dynamic transmission error and dynamic load of the gear pair was also studied. The results show that: 1)~the dynamic transmission error of the gear pair decreases and the dynamic load of the gear pair increases with the increase of the gear module at the lower range of excitation frequencies; 2)~the dynamic windup angle of the one-way clutch increases with an increase of the gear module. 3)~the dynamic transmission error of the gear pair and the maximum dynamic load increases with an increase of the one-way clutch torsional stiffness at the lower and medium range of excitation frequencies. The above results can provide reference for the subsequent upgrade and improvement of the two-speed transmission system.

Research on nonlinear dynamic characteristics of high-speed gear in two-speed transmission system

“…Wang 21 established a planetary gear torsional vibration model considering clutch friction torque and other factors, and studied the influence of clutch friction torque and planetary gear meshing stiffness on system vibration. Chen 22 established a nonlinear dynamics model of two-stage gear transmission system with overrunning clutch, numerically solved the model with Runge-Kutta method, and studied the influence of gear modulus and clutch torsional stiffness on dynamic characteristics of the system.…”