Fig 1.
Schematic diagram of TSO-VMD-BILSTM-AEAM algorithm structure.
Fig 2.
Measurement index diagram of elevator operating parameters.
Fig 3.
Diagram of TSO optimized VMD parameter.
Fig 4.
Variational modal decomposition diagram of running speed sequence.
Fig 5.
Diagram of BILSTM-AEAM algorithm structure.
Fig 6.
Feature importance ranking.
Fig 7.
Variation range diagram of elevator current, voltage and speed under normal operation.
(a). Current; (b) voltage; (c) speed.
Table 1.
Experimental dataset.
Fig 8.
Comparison of training results before and after improvement of LSTM-AE algorithm.
Fig 9.
Comparison of test errors before and after improvement of LSTM-AE algorithm.
Table 2..
Ten test sets of data.
Fig 10.
Comparison of TPR, FPR, and AUC for Different Methods (Five-Fold Cross-Validation).
Table 3..
Confidence interval summary.