A systematic optimal design approach of dual-motor coupling drive system

This paper proposes a systematic design method for a dual-motor coupling drive system (DMCDS) based on dual-planetary gearsets. A D-matrix framework is developed to generate topological configurations and derive the corresponding kinematic equations in torque coupling (TC) and speed coupling (SC) modes. Screening rules are introduced to eliminate infeasible configurations, especially those with circulating power. Then, an optimization model is established for parameter matching, in which the Analytic Hierarchy Process (AHP) is used to determine the weights of the optimization indices and Particle Swarm Optimization (PSO) is adopted to search for feasible parameter sets. The results show that 10 configurations satisfy the design constraints. TC mode simulation results further indicate that the selected configurations avoid circulating power and show better coupling-mechanism efficiency than the reference configuration.