Date of Award

2020

Document Type

Open Access Dissertation

Degree Name

Doctor of Philosophy in Mechanical Engineering-Engineering Mechanics (PhD)

Administrative Home Department

Department of Mechanical Engineering-Engineering Mechanics

Advisor 1

Darrell L. Robinette

Committee Member 1

Jason R. Blough

Committee Member 2

Jeremy P. Bos

Committee Member 3

James P. DeClerck

Abstract

This study was conducted to perform experimental vibration testing on a light duty rear wheel drive vehicle. The vehicle is known to have excessive longitudinal acceleration response perceived after step changes in the driver torque command. The excessive response includes shuffle and clunk transients. Experimental testing was performed to understand the coupling between driver torque commands and peak shuffle oscillations. Data was also targeted to understand the coupling between driveline torsional oscillations and longitudinal vehicle vibrations. This data was also used to establish vehicle parameters for use in an analytical CAE model of the driveline and coupling. Driver applied tip-in and tip-out transients were captured with road testing on a rear wheel drive dynamometer test rig. Transducer signatures were captured during testing to estimate backlash size, shuffle frequency, and the influence of vehicle speed or gear. The data successfully extracted the shuffle frequency in 3rd-6th gear. Vehicle parameters extracted were used to assemble a CAE model with correlation

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