Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Back-to-back test rig instrumentation for transmission error measurement
Submission Author:
Matheus Fernandes Vieira , SP
Co-Authors:
Matheus Fernandes Vieira, Guilherme Dos Santos, Ronnie Rego
Presenter: Matheus Fernandes Vieira
doi://10.26678/ABCM.COBEM2023.COB2023-0433
Abstract
Gearbox noise emission has become a critical design factor for electric vehicles. The replacement of the internal combustion engine and the increased speed make the noise coming from the transmission more noticeable. Transmission error (TE) is the main source of excitation in a gearbox. The present work has as its objective sensoring a back-to-back test rig, and mapping the requirements, to measure TE. Two high precision incremental encoders have been used to measure the angular position of two shafts connected by a gear pair. TE was calculated by the difference between gear real and theoretical position. The experimental results were compared to those calculated with the help of KISSsoft. The gearbox dynamic behavior was also analyzed by monitoring the gearbox housing vibration. Test rig measurements for TE correlated well with KISSsoft calculations. Static transmission error proves to be an indicator of gearbox dynamics behavior. Encoders requirements to measure TE were mapped and evaluated. Regarding electric vehicle drivetrain systems, the presented approach is a tool for future investigations focused on improving NVH performance.
Keywords
transmission error, noise, Vibration, Instrumentation, electric powertrain
