Degradation prediction method of PEMFC based on deep learning hybrid model integrating ARIMA and LSTM

基于ARIMA-LSTM深度学习混合模型的PEMFC老化预测方法

Received: 8 August 2022

Abstract

Fuel cell involves many disciplines such as electricity, mechanics, electrochemistry, and thermodynamics, and its performance degradation process is complex, involving multi-physics, multi-scale, multi-parts, and multi-factors. Thus, it is difficult for a single model to capture all kinds of characteristics of fuel cell simultaneously in degradation prediction. To ensure the prediction accuracy while better fitting the data linearly and nonlinearly, a prediction model of ARIMA combined with LSTM neural network is proposed in this study. The prediction results with residuals are used as features for LSTM prediction work after first predicting the voltage decay data by ARIMA and LSTM. Comparing the hybrid model with the single ARIMA model and the NAR model with support vector regression learning, it is found that the hybrid model performs better in terms of prediction accuracy and prediction performance.

摘要

燃料电池涉及电学、机械、电化学、热力学等诸多学科, 其性能衰减过程复杂, 涉及多物理、多尺度、多部件、多因素, 单一模型在燃料电池老化预测中难以同时对其各类特征进行捕获。为在确保预测精度的同时更好地对数据进行线性和非线性拟合, 提出一种差分移动平均自回归结合长短期记忆神经网络的预测模型。通过ARIMA(autoregressive integrated moving average model)与LSTM(long short-term memory)对电压衰退数据线性及非线性部分进行预测后, 将预测结果与残差作为特征用于LSTM预测工作。将混合模型与单一ARIMA模型、NAR模型、支持向量回归学习对比发现, 混合模型在预测精确度和预测性能方面均有较好表现。