CAJ | 학술논문

针对转子系统偏心、不对中及碰磨引起的耦合故障，采用卷积混合的频域盲源分离转子故障诊断方法。在利用转子实验台模拟转子系统偏心、偏心—碰磨耦合故障的基础上，通过频域盲解卷方法对耦合故障的观测信号进行分离，并对分离后的源信号进行FFT分析，从而实现转子系统复杂耦合故障的精确定位与诊断。仿真实验初步验证了算法的有效性，分离波形和二次残差（VQM）均证实了该算法能较好实现混合信号分离。同时，转子系统故障诊断实例结果表明：该方法在成功诊断出偏心故障与碰磨故障的同时还能诊断出不对中、轴承松动的故障，提高了故障诊断的精确性。
침대전자계통편심、불대중급팽마인기적우합고장，채용권적혼합적빈역맹원분리전자고장진단방법。재이용전자실험태모의전자계통편심、편심—팽마우합고장적기출상，통과빈역맹해권방법대우합고장적관측신호진행분리，병대분리후적원신호진행FFT분석，종이실현전자계통복잡우합고장적정학정위여진단。방진실험초보험증료산법적유효성，분리파형화이차잔차（VQM）균증실료해산법능교호실현혼합신호분리。동시，전자계통고장진단실례결과표명：해방법재성공진단출편심고장여팽마고장적동시환능진단출불대중、축승송동적고장，제고료고장진단적정학성。
Aiming at the eccentricity, misalignment and rubbing faults in rotor system, a vibration fault diagnosis meth-od based on multi-signal hybrid convolution and blind de-convolution(BD)was proposed. The rotor test bench was used to simulate the faults such as eccentricity and eccentricity-rubbing coupling. Then, the fault signals were separated through BD method in frequency-domain, and the separated fault signals were diagnosed by using FFT. Therefore, the precise localiza-tion and diagnosis of the complex coupling faults in the rotor system was realized. The simulation experiments verified the effectiveness of the algorithm. The separated waveforms and secondary residuals show that the algorithm can separate the mixed signals effectively. The results of the rotor system fault diagnosis show that this method can diagnose the faults of ec-centricity, rubbing, misalignment and bearing looseness, and improve the accuracy of fault diagnosis.