Mechanical Fault Diagnosis Based on All-phase FFT Parameters Estimation

摘要：

To improve the accuracy of mechanical fault diagnosis, all-phase FFT (apFFT) is introduced to estimate individual harmonics frequency, amplitude and phase of fault signal. Combining with synthesized FFT/apFFT correcting method of phase difference, the frequency and amplitude estimation can be obtained by utilizing these two spectral analysis results at the position of peak spectral line. Moreover, due to apFFTs property of phase invariance, the phase value at main spectral position can be directly taken as the original phase without any correcting operations, thus, waveform reconstruction is realized. Simulation experiment proves that fault information can be intuitively reflected by the quality of reconstructed waveform, and the corresponding type of mechanical fault based on parameters estimation can be identified.

关键词： Fault Diagnosis spectrum correction All-phase FFT waveform reconstruction

作者: Xiangdong Huang Haitao Cui Zhaohua Wang Yifang Zeng

作者单位: School of Electronics and Information Engineering, Tianjin University, Tianjin, China

会议类型: 国际会议

会议名称: 2010 IEEE 10th International Conference on Signal Processing(第十届信号处理国际会议 ICSP 2010)

会议地点: 北京

会议语种:英文

页码: 176-179

在线出版日期: 2010-08-24（万方平台首次上网日期，不代表论文的发表时间）