CAJ | 학술논문

快速谱峭度图（Fast Kurtogram）算法具有能自适应选取共振解调频带并实现包络解调提取的优点，在滚动轴承包络分析中有广阔的应用前景，但其在实际应用中，若被采集信号中包含有较高峰值的脉冲干扰时，将可能导致谱峭度图的自适应共振带确定失效，最终导致无法获得包含有效滚动轴承的故障特征信息的包络信号。为解决快速谱峭度图算法的上述不稳定问题，本文提出了一种基于子频带谱峭度平均的改进快速谱峭度图算法，其可有效消除或削弱脉冲干扰成分对谱峭度图结果的影响，提高了共振解调频带确定的鲁棒性，实现了基于快速谱峭度图算法的滚动轴承故障特征准确提取。仿真和试验结果验证了本方法的有效性。
쾌속보초도도（Fast Kurtogram）산법구유능자괄응선취공진해조빈대병실현포락해조제취적우점，재곤동축승포락분석중유엄활적응용전경，단기재실제응용중，약피채집신호중포함유교고봉치적맥충간우시，장가능도치보초도도적자괄응공진대학정실효，최종도치무법획득포함유효곤동축승적고장특정신식적포락신호。위해결쾌속보초도도산법적상술불은정문제，본문제출료일충기우자빈대보초도평균적개진쾌속보초도도산법，기가유효소제혹삭약맥충간우성분대보초도도결과적영향，제고료공진해조빈대학정적로봉성，실현료기우쾌속보초도도산법적곤동축승고장특정준학제취。방진화시험결과험증료본방법적유효성。
The fast kurtogram algorithm has the advantages of choosing resonance demodulation frequency band adaptively and being able to realize the envelope demodulation extraction,so,it has broad application prospect in the rolling bearing envelope analysis.But in the fast kurtogram calculation,the existense of a high peak pulse interference in the vibration signal may result in that,the fast kurtogram calculation fails to determine the adaptive resonance frequency band,eventually the envelope may not be effectively extracted and used as the rolling bearing fault characteristic information.In order to solve the instability problem of fast kurtogram algorithm,an improvement fast kurtogram algorithm based on the average of sub-band spectral kurtosis was presented.The method can effectively eliminate or weaken the influence of pulse interference on the result of fast kurtogram,improve the robustness of the algorithm and make better the stability of the frequency band selection for resonant demodulation.The method proposed can extract the rolling bearing fault feature accurately.The simulation and experimental results veried its effectiveness.