基于LSTM-DBN的航空发动机剩余寿命预测

针对航空发动机剩余寿命(remaining useful life, RUL)预测中多传感器监测数据维度高、规模大以及时间序列信息考虑不充分等问题,提出一种融合长短时记忆(long short-term memory, LSTM)网络和深度置信网络(deep belief network, DBN)的RUL预测方法。首先,利用LSTM分别对单一传感器进行时间序列预测。其次,将预测结果整合输入到DBN进行健康指标提取。再次,结合健康指标预测曲线和失效阈值得到RUL预测结果。最后,利用商用模块化航空推进系统仿真数据集开展实验,并与已有方法进行对比分析,验证了该方法的可行性和有效性。

Remaining useful life prediction for aircraft engine based on LSTM-DBN

In order to solve the problems of high dimension and large scale of multi-sensors monitoring data and insufficient consideration of time series information in the remaining useful life (RUL) prediction of the aircraft engine, a RUL prediction method based on the long short-term memory (LSTM) network and deep belief network (DBN) is proposed. Firstly, the time series of a single sensor is predicted by using the LSTM network. Secondly, the prediction results are integrated into the DBN to extract the health indicator. Thirdly, the RUL prediction results are obtained by combining the health indicator prediction curve and the failure threshold. Finally, to validate the feasibility and the effectiveness of the proposed method, an experiment is carried out on the commercial modular aero-propulsion system simulation data set and the prediction results are compared with the existing methods.