CAJ | 학술논문

针对全息谱在频谱密集情况下精度会降低的问题,提出了基于频谱细化和相位差校正的全息谱分析方法。该方法采用复解析带通滤波器选带细化方法对以阶次频率为中心的局部区间进行细化分析,通过提高频率分辨率来消除密集频谱对精确获取幅值、相位信息的影响,运用相位差法对细化区间内的最大谱峰进行频率、幅值、相位校正,准确地提取出各阶次的幅值、相位信息,最后合成全息谱图。仿真及对柔性转子试验台振动信号的分析结果表明,基于频谱细化和相位差校正的全息谱能有效提高其分析精度,更加精确有效地诊断旋转机械的故障。
침대전식보재빈보밀집정황하정도회강저적문제,제출료기우빈보세화화상위차교정적전식보분석방법。해방법채용복해석대통려파기선대세화방법대이계차빈솔위중심적국부구간진행세화분석,통과제고빈솔분변솔래소제밀집빈보대정학획취폭치、상위신식적영향,운용상위차법대세화구간내적최대보봉진행빈솔、폭치、상위교정,준학지제취출각계차적폭치、상위신식,최후합성전식보도。방진급대유성전자시험태진동신호적분석결과표명,기우빈보세화화상위차교정적전식보능유효제고기분석정도,경가정학유효지진단선전궤계적고장。
A new method of holospectrum based on zoom spectrum and correction of phase difference was put forward against to the lower precision of traditional holospectrum in intensive spectrum environment.First,it took complex analytical band-pass filter to conduct zoom,analysed the local range,the center of which was order frequency,and then the impact of intensive spectrum could be eliminated by increasing the frequency resolution.With correction of phase difference for the max peak,the amplitude and phase of each order frequency can be acquired.At last,the holospectrum was synthesized.Through simulation and analysis of flexible rotor＇s vibration signals,the results show that it has higher precision in practice and can diagnose the rotation machinery fault more accurately and more effectively.