In order to reduce power loss and transmission error in double planetary gear systems, this paper proposes an optimization method for double planetary gear systems. First, a macro-parameter optimization model is established with power loss and transmission error fluctuation as the objective functions, macro-parameters such as tooth count, module, and pressure angle as design variables, and transmission ratio, assembly, and fatigue strength as constraint conditions. Second, the Sparrow Search Algorithm (SSA) is improved by incorporating the tent chaos mapping, Levy flight mechanism, and T-distribution perturbation. The improved optimization method is compared with three other optimization algorithms. The comparison results show that the improved sparrow search algorithm (ISSA) improves the global optimal search ability and robustness. Finally, ISSA is applied to optimize the macro parameters of the double-row planetary gear system. The optimization results show that the power loss of the double-row planetary gear system is reduced by 39.5% and the transmission error is reduced by 42%. At the same time, the objective function values before and after the optimization of the macro parameters of the gear are calculated. The results show that under different transmission routes, the power loss and transmission error of the double-row planetary gear system after macro parameter optimization were reduced to varying degrees, and the dynamic performance of the system was improved.
Wu et al. (Fri,) studied this question.