When early faults accur, the background noise is heavy, it is difficult to extract the latent periodic components successfully using second order cyclostationary analysis alone. 摘要由于噪聲的嚴重干擾，在滾動(dòng)軸承早期故障時(shí)，僅僅利用二階循環(huán)平穩分析方法往往較難成功提取出信號中潛在的有用周期信息。
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