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中文摘要：
针对采集转子振动信号时信号中往往夹杂着噪声干扰的问题，提出了一种自寻优阈值的小波包降噪方法。该方法可对不同振动信号自寻优地设置阈值，且阈值的选取与所研究的信号有关而与信号长度无关；并根据采样定理计算不同转子转速对应的小波包分解的最低层数。对多种信号进行的降噪研究表明，该方法可有效降低转子振动信号中的噪声干扰。
英文摘要：
Since the rotor vibration signal acquisition often mingled with the noise interference, a self-opti-mized threshold wavelet packet denoising method was proposed. Self-optimized threshold, which was linked to the signal itself rather than the length of signal, was set for different vibration signals. And the low-est layer of wavelet packet was decomposed according to the rotor speed. The research results show that, this method can reduce the noise disturbance in rotor vibration signal effectively, and has certain applica-tion value.
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