A Novel Method for Induction Motor Fault Identification Based on MSST and LightGBM

Induction motors are widely used in industries and daily lives. The sudden occurrence of motor faults can cause huge economic losses and even inflict human injuries. To identify the motor faults promptly and improve the operation reliability. This paper presents a novel method for induction motor fault identification. The method consists of five main steps: multi-synchrosqueezing transform (MSST) analysis, signal texture feature extraction, multi-domain feature vector construction, feature dimension reduction with Linear Discriminant Analysis (LDA), and fault identification with light gradient boosting machine (LightGBM) algorithm. In the process, MSST is first utilized to get an energy-concentrated time-frequency (TF) representation of the signal, the texture features of TF images are calculated with gray level co-occurrence matrix (GLCM), then combined with time-domain and frequency domain-features, a multi-domain feature matrix is constructed and a low-dimension feature matrix is obtained by LDA to improve the feature quality. After that, a LightGBM model is trained with the new low dimension feature matrix to identify the motor faults. The proposed method is validated by the experiment dataset of the drivetrain dynamics simulator, and the results proved that the approach can accurately classify different induction motor faults.