Abstract:  Aiming at the problem that the research of gear train motion scheme design had not formed a perfect theoretical system, the motion scheme of gear train was analyzed by means of unit combination method and example verification,a gear train motion scheme analysis model was established. Through the unit connection equation and the unit combination characteristic state equation, the characteristic state matrix decomposition rules were analyzed, and the system matrix series algorithms, parallel algorithms and hybrid decomposition algorithms were obtained, which realized the characteristic state matrix decomposition and formed the design steps of the gear train motion scheme. At the same time, there were basic units including transmission ratio, input speed and other design requirements in the unit library of gear train. The motion characteristic matrix was split, the units were obtained and combined by way of matching. The results show that the method is very efficient and applicable. Taking the solution of the motion scheme of the gear train of the variable propeller gearbox for wind power generation as an example, the results of 9motion schemes are obtained. It is proved that the analysis method can provide reference for the research of gear train motion scheme in practical engineering.

Key words:  motion plan; composite unit; feature matrix; combination method; combination constraint

ZHAO Yong-sheng, XIN Chao-chao, MA Ya-li, et al. Analysis of the motion scheme of gear train under unit combination［J］.Journal of Mechanical & Electrical Engineering, 2021,38(8):1010-1015,1063.