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Analysis of Vehicle Alternator Noise Based on Test Orientation
Author(s): 
Pages: 104-107
Year: Issue:  2
Journal: Journal of Liaoning Institute of Technology(Natural Science Edition)

Keyword:  automobile generatornoise analysistest orientationcontrast analysis;
Abstract: The test data were analyzed, which were obtained by testing the automobile generator in different test orientations including front, back and side. First, the contribution of the noise coming from the generator's front, back and side to the whole noise was analyzed. The result shows that the noise coming from the back accounts for the largest part. Then the data of generators of different orders were analyzed and the top two orders which contribute the most to the sound pressure level were chosen to be compared with the standard generator in different test orientations. Finally, a numerical sound pressure level is used to further locate the noise generated by the motor speed range. And the reasons for noise to arise is analyzed.
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