Experimental Analysis of Noise Characteristics of Electric Agricultural Utility Terrain Vehicle Gearbox

Abstract

Purpose: Noise and vibration measurement tests have been performed to analyze the source of noise in a utility terrain vehicle (UTV) gearbox to improve its quality. For accurate analysis of gearbox noise source, the effects of other test equipment should be separated from the gearbox noise results. In this study, the noise source of the gearbox was investigated through noise and vibration tests of the gearbox and dynamometer. Methods: Noise and vibration were measured during gearbox and dynamometer run-up tests. Dominant noise types were identified through order tracking analysis of the test results. Results: Some types of noise were identified in the Campbell diagram. By separating the effect of the inverter and dynamometer noise, it was confirmed that the 6.39th-, 12.78th-, 14th-, and 28th-order components were the sources of noise generated by the gearbox. Conclusions: Dominant order components caused by the gearbox were identified. These components are expected to be used as excitation sources for the optimization of noise reduction in electric UTV gearboxes.