Health state prediction of rolling bearings based on MD-CUSUM and TD-SVR#br#

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (19) : 83-88.

XIA Junzhong, L Qipeng, CHEN Chengfa, LIU Kunpeng, ZHENG Jianbo

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Abstract

Fault feature extraction is the key of bearings’ health state description, however, features extracted with currently common methods may have higher dimensions or they are lack of information and unable to reflect bearings’ health state monotonously, and the predicted results cannot effectively reveal the degradation trend of bearings.Here, the cumulative sum and Mahalanobis distance (MD-CUSUM) was adopted to realize feature dimension reduction, obtain the health index (HI), and reflect monotonously health state of bearings with lower dimensions.Furthermore, a time delayed support vector regression (TD-SVR) model was constructed to improve the prediction accuracy for health state of rolling bearings.The advantages and disadvantages of MD-CUSUM and those of the isometric feature mapping were compared through test data analysis.The results showed that the combination of MD-CUSUM and TD-SVR has a better effect on predicting health state of bearings.

Key words

rolling element bearing / health indicator / cumulative sum and mahalanobis distance / time delay support vector regression / isometric feature mapping

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XIA Junzhong, L Qipeng, CHEN Chengfa, LIU Kunpeng, ZHENG Jianbo. Health state prediction of rolling bearings based on MD-CUSUM and TD-SVR#br#[J]. Journal of Vibration and Shock, 2018, 37(19): 83-88

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