基于相位差校正法的全息谱研究  

Study on holospectrum based on correction of phase difference

作　　者：汤宝平[1] 陈建波[1] 章国稳[1] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044

出　　处：《振动与冲击》2009年第8期99-102,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(50875272;50735008);霍英东教育基金会11届青年教师基金(111057);第四十三批博士后科学基金(20080430749)

摘　　要：针对传统全息谱在噪声干扰下精度降低的问题,提出了一种新的基于相位差校正法的全息谱分析方法。该方法首先对时域信号加窗截断后进行FFT变换,然后引入相位差法校正其频率、幅值和相位,最后合成全息谱图。通过仿真及对柔性转子实验台振动信号的分析,表明基于相位差校正法的全息谱可以明显提高其分析精度,更加精确而有效地诊断旋转机械的故障。A new method of holospectrum based on correction of phase difference was put forward in view of the lower precision of traditional holospectrum under noisy interference. In the method, the windowed FFT transformation of signal was performed, the frequency,amplitude and phase were modified by correction of phase difference, and then the holospectrum was synthesized.Through simulation and analysis of flexible rotor’s vibration signal, the results show that the method is of higher precision in practice and can diagnose the rotating machinery fault more accurately and more effectively.

关 键 词：相位差 频谱校正 全息谱 旋转机械 

分 类 号：TH113.1[机械工程—机械设计及理论] TN911.7[电子电信—通信与信息系统]