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Abstract
The purpose of this project report is to report the final results for a capstone design project for the Milwaukee School of Engineering Master of Science in Engineering. program. The purpose, background, and justification are described in this report. This report is the culmination of the proposal, progress, and final results for this project. The purpose of this project was to model the tribological aspects in a variable displacement linkage motor for off-highway vehicles using MATLAB and GT – SUITE simulation. Models for steady state friction torque, power losses, and film thickness for bearings and cam follower mechanism were developed in this project. The MATLAB programs developed have been included in this report. This project was sponsored by the Department of Energy and is part of an ongoing larger project led by the University of Minnesota, Minnesota. This project’s tribological model will be integrated into the complete model of the motor by UMN.
Comparison of bearing power losses have been displayed for MATLAB and GT – SUITE. It can be observed that there was general agreement between the MATLAB results and the results obtained from the three-loss method in the GT – SUITE simulations. The total bearing loss for the current motor design was also analyzed in order to determine a good idea of the losses in the selected bearings. Film thicknesses for bearings and the cam were also evaluated. The power losses from the cam roller follower were additionally analyzed for this project.