CAJ | 학술논문

　　为了提高故障诊断正确率，提出了一种基于复数三阶累积量的机械故障诊断方法。三阶累积量的不同定义的复数形式包含了信号间不同的耦合信息，利用这些信息进行了故障诊断。在溢流阀故障诊断实验中，利用这些不同的耦合信息，通过二维小波在不同的方向上对故障信号和正常信号进行特征提取，然后将这些特征值输入支持向量机进行故障判别。实验结果表明，上述方法可以提高故障诊断正确率。同时还对实数三阶累积量也进行了相同的实验，这些实验所取得的诊断效果证明了采用本文方法的有效性。
　　위료제고고장진단정학솔，제출료일충기우복수삼계루적량적궤계고장진단방법。삼계루적량적불동정의적복수형식포함료신호간불동적우합신식，이용저사신식진행료고장진단。재일류벌고장진단실험중，이용저사불동적우합신식，통과이유소파재불동적방향상대고장신호화정상신호진행특정제취，연후장저사특정치수입지지향량궤진행고장판별。실험결과표명，상술방법가이제고고장진단정학솔。동시환대실수삼계루적량야진행료상동적실험，저사실험소취득적진단효과증명료채용본문방법적유효성。
In order to improve the correction rate of fault diagnosis, one method of mechanical fault diagnosis based on complex three-order cumulants was proposed. The complex forms with different definitions of three-order cumu-lants included different coupling information of signals,which was used to diagnose fault. In the experiment on the fault diagnosis of overflow valve,using the different coupling information, the features of fault signals and normal signals were extracted by 2-D wavelet in different directions,and then they were input into support vector machine to diagnose the fault. The experiment results show that this method can improve the correction rate of diagnosis. Fur-thermore,the same experiment was performed on the real three-order cumulants,and the results verify the effective-ness of the method proposed in this paper.