A Novel Multiscale Deep Health Indicator with Bidirectional LSTM Network for Bearing Performance Degradation Trend Prognosis

Table 4

Comparison of five prediction performance measures.

Method of prediction	RMSE	MAE	R^2
MDBHI-BiLSTM	0.0168	0.0070	0.9655
SAE-LSTM	0.0247	0.0127	0.9065
PCA-LSTM	0.0283	0.0149	0.8903
RMS-RNN	0.0433	0.0213	0.8169
RMS-BP	0.0689	0.0453	0.5360