This thesis presents a multi-faceted investigation into the dynamics of a three-gear idler gear train. Previous work and motivation for current research is discussed. Modifications to the physical test stand, new experimental procedures, and data acquisition software developments are detailed. Results for multiple phases of testing are given. Impact testing and shaker testing results on the complete system and isolated test gearbox are shown. Results from spinning system tests following bearing modifications are given along with a comparison to previous assemblies. Modal testing on the gearbox housing is shown as is the discovery of significant unexpected shaft bending behavior in the test gearbox shafts. Development of analytical models to incorporate additional degrees of freedom outside the gearbox is undertaken and correlation for the most recent test gearbox assembly is presented along with accepted system parameters.
Following characterization of the new assembly, conclusions and recommendations for future work are made.