YE Rui-da,WANG Wei-jie,HE Liang,et al.RUL prediction of aero-engine based on residual self-attention mechanism[J].Optics and Precision Engineering,2021,29(06):1482-1490.
YE Rui-da,WANG Wei-jie,HE Liang,et al.RUL prediction of aero-engine based on residual self-attention mechanism[J].Optics and Precision Engineering,2021,29(06):1482-1490. DOI: 10.37188/OPE.20212906.1482.
RUL prediction of aero-engine based on residual self-attention mechanism
In this study, the remaining useful life (RUL) prediction algorithm based on the residual self-attention mechanism is employed to address the shortcomings of traditional neural networks in the context of multi-dimensional data high-resolution feature recognition and high-precision signal extraction. The structural characteristics of a convolutional neural network and long short-term memory (LSTM) neural network are compared and analyzed, whereby their limitations are revealed in terms of their long-sequence information feature correlation and local feature extraction abilities. Furthermore, as part of our research on the self-attention mechanism, we introduce a double-layer residual network to suppress the spread of the error function back propagation, following which we construct a deep learning method for the convolutional memory residual self-attention mechanism. Simulation analyses of the typical aviation aero-engine degradation experiment data set show that the proposed method can effectively establish the relationship between the monitoring data and engine health status. The obtained value of the key evaluation index, namely, the mean square error (MSE) of the RUL prediction, is 225. When compared with that of the traditional self-attention mechanism, the MSE in this case is reduced by 17.9%, which verifies the feasibility and effectiveness of the proposed method.
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