Abstract
Addressing the complexity of system-level modeling and computation in transmission systems, this paper investigates an Aerospace Three-Ring Reducer (ATRR) and proposes a coupled dynamic modeling approach basd on Component Mode Synthesis (CMS), within which Multi-Point Constraint Coupling and Automated Model-Order Reduction are incorporated to balance modeling accuracy and computational efficiency. Regarding the mechanical characteristics of the aeronautical electromechanical actuators, the whole aeronautical TRR is divided into subcomponents such as the crankshaft, the output shaft, and the internal gear disc. According to the coupling relationship between gears, output shaft and the internal gear disc are further divided into the gear meshing unit and the linkage unit. The crankshaft and linkage unit adopts beam unit theory to establish the nodal model, the output shaft adopts the combination of mass equivalence method and beam unit theory to establish the nodal model. The condensation model of internal gear disc is established based on the super unit theory. Thus, the rigid-flexible coupling dynamics model of the drive system of the ATRR was established. The model was solved: quasi-static and dynamic results were obtained, which verified that the comprehensive modeling strategy of this paper is superior to the traditional concentrated mass method. This paper provides a new method for dynamic modeling and analysis of complex gear transmission systems similar to three ring reducers and provides a high-precision and efficient model foundation for optimizing the dynamic characteristics of transmission systems.
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