HUANG Kai1, ZHENG Yaochen2,3, DENG Zhaoxiang1,2,3
1. College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing 400044, China;
2. China Automotive Engineering Research Institute Co., Ltd., Chongqing 401122, China;
3. State Key Lab of Vehicle NVH and Safety Technology, Chongqing 401122, China
Abstract:At this stage, the diagnosis of vehicle squeak & rattle mainly relies on the subjective judgment of experienced engineers, and there are problems of inaccuracy, easy to make mistakes, and easy to miss. This paper conducts statistical analysis on the measured signals of abnormal sound from vehicle’s rattle noises to obtain Mel Frequency Cepstrum Coefficient (MFCC), and uses this as the feature vectors to characterize the source of abnormal sound, and constructs its joint probability distribution based on the maximum likelihood estimation method Gaussian Mixture Model (GMM), so that the GMM model can be used for likelihood discrimination for unknown measured rattle noise signals. The article points out the difference between speaker recognition technology and rattle noise recognition, namely the selection of the number of Mel triangle filters and the number of discrete cosine transform (DCT) output coefficients, and the feasibility of the method Analyze, and finally verify by experiment. The results show that the recognition rate of this method is more than100%, and the rejection rate is more than100%, which lays the foundation for the objective evaluation method of vehicle squeak & rattle.
Keywords: Speaker recognition; Rattle; Mel Frequency cepstrum coefficient; Gaussian mixture model.
黄凯1,郑瑶辰2,3,邓兆祥1,2,3. 基于MFCC的汽车敲击异响识别[J]. 振动与冲击, 2022, 41(13): 275-282.
HUANG Kai1, ZHENG Yaochen2,3, DENG Zhaoxiang1,2,3. Recognition of vehicle’s rattle based on MFCCs. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(13): 275-282.
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