The invention provides an aero-engine service life prediction and maintenance method with risk avoidance. The aero-engine service life prediction and maintenance method comprises the following steps: acquiring aero-engine operation data; selecting degradation data based on the correlation index and the consistency index; constructing an aero-engine residual life prediction model by using a support vector regression machine SVR and a long and short term memory network LSTM; designing a risk avoidance function of the prediction model; the online residual life of the aero-engine is predicted, and a maintenance strategy of the aero-engine is formulated. According to the method, the selected degradation data is added into the prediction model, so that the life prediction and maintenance decision of the aero-engine has a lower calculation amount and a higher convergence speed under the condition of uncertainty, meanwhile, the risk avoidance function is added, the SVR model and the LSTM model are effectively fused, the robustness of RUL prediction is enhanced, and the prediction accuracy of the life prediction and maintenance decision of the aero-engine is improved. And meanwhile, systematic risks caused by lagging RUL prediction on maintenance decisions can be avoided.

    本发明提供了一种具有风险规避的航空发动机寿命预测和维护方法,包括:获取航空发动机运行数据;基于相关性指标和一致性指标选取退化数据;利用支持向量回归机SVR和长短时记忆网络LSTM构建航空发动机剩余寿命预测模型;设计预测模型的风险规避函数;预测航空发动机的在线剩余寿命,并制定航空发动机的维护策略。本发明的预测模型中加入了选取的退化数据,使航空发动机的寿命预测和维护决策在存在不确定性情况下具有更低的计算量和更快的收敛速度,同时加入了风险规避函数,有效地将SVR模型和LSTM模型融合起来,增强了RUL预测的稳健性,同时能够规避滞后RUL预测对维护决策带来的系统性风险。


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    Title :

    Aero-engine service life prediction and maintenance method with risk avoidance


    Additional title:

    一种具有风险规避的航空发动机寿命预测和维护方法


    Contributors:
    CHEN CHUANG (author) / WU YUHENG (author) / SHI JIANTAO (author)

    Publication date :

    2024-05-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G06N COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS , Rechnersysteme, basierend auf spezifischen Rechenmodellen / F02C Gasturbinenanlagen , GAS-TURBINE PLANTS / G06Q Datenverarbeitungssysteme oder -verfahren, besonders angepasst an verwaltungstechnische, geschäftliche, finanzielle oder betriebswirtschaftliche Zwecke, sowie an geschäftsbezogene Überwachungs- oder Voraussagezwecke , DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES / F01D Strömungsmaschinen [Kraft- und Arbeitsmaschinen oder Kraftmaschinen], z.B. Dampfturbinen , NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES / G07C TIME OR ATTENDANCE REGISTERS , Zeit- oder Anwesenheitskontrollgeräte / B64F GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT , Boden- oder Flugzeugträgerdeckeinrichtungen besonders ausgebildet für die Verwendung in Verbindung mit Luftfahrzeugen / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung



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