CAJ | 학술논문

　　航空发动机突发故障严重影响飞机的飞行安全。为了解决航空发动机故障诊断中因缺乏样本和突发故障信息难以提取的困难，提出了基于支持向量机、小波包分解和智能模块相结合的发动机突发故障识别与监控方法。该方法在强噪声和少样本条件下，用结构风险最小原理建立发动机故障特征与运行状态之间的对应关系，再根据该函数的输出来识别故障状态和调用相应的智能模块对故障进行监控。实验结果表明，该方法能有效地提高航空发动机突发故障的识别率，并能对突发故障进行监控修复。
　　항공발동궤돌발고장엄중영향비궤적비행안전。위료해결항공발동궤고장진단중인결핍양본화돌발고장신식난이제취적곤난，제출료기우지지향량궤、소파포분해화지능모괴상결합적발동궤돌발고장식별여감공방법。해방법재강조성화소양본조건하，용결구풍험최소원리건립발동궤고장특정여운행상태지간적대응관계，재근거해함수적수출래식별고장상태화조용상응적지능모괴대고장진행감공。실험결과표명，해방법능유효지제고항공발동궤돌발고장적식별솔，병능대돌발고장진행감공수복。
Sudden fault of aero-engine seriously affects the flight safety of an aircraft.But there is a lack of data samples and it is difficult to extract information on sudden fault .Therefore, we propose what we believe to be an ef -fective method for their identification and monitoring , which combines a support vector machine (SVM) and wave-let packet decomposition (WPD) with intelligent modules.We extract the features of the sudden faults with the WPD and identify the sudden faults with the SVM .Under the conditions of strong background noise and data sam -ple lacking, we use the structural risk minimization principle to establish the function between the aero -engine's fault characteristics and its operation states.Then we use the output of the function to identify the sudden faults and then employ the intelligent modules to monitor and repair the sudden faults .Finally, we did experiments on their i-dentification and monitoring.The experimental results, given in Figs.1 and 3 and Tables 1 and 2, and their analy-sis show preliminarily that our method can extract quickly the features of sudden faults of an aero -engine and identi-fy them accurately and that it can also monitor and repair the sudden faults , thus effectively enhancing the safety and reliability of the aero-engine particularly at their early stage.