Early RubImpact Fault Diagnosis Based on Wavelet Packet Decomposition
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摘要: 研究了旋转机械转静件早期碰摩故障信号的检测问题.根据小波包分解能在所有频率范围聚焦,对信号奇异性非常敏感的特性,对比分析了不碰摩和早期碰摩信号的小波包分解细节分量,得出应用小波包分解可实现早期碰摩故障诊断.同时,还研究并实现了碰摩故障的定位问题.Abstract: Rub-impact signal detection between rotor and stator is investigated. The features of no rub-impact and early rub-impact are analysed based on the wavelet packet decomposition, which is sensitive to the singularity of signal and able to offer a richer resolution in frequency band than wavelet decomposition. Results show that the wavelet packet decomposition can be used to detect rub-impact signal effectively, and the localization of rub-impact faults can be realized with the present method.
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Key words:
- fault diagnosis /
- collisions /
- signal detection /
- wavelet packet decomposition
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