【摘要】：三階累積量對角切片譜可以識別二次相位耦合關(guān)系,抑制不存在耦合的頻率成分,由于此優(yōu)良的性質(zhì),對角切片譜在信號分析領(lǐng)域得到了廣泛的應(yīng)用。然而,二次相位耦合的定義要求原始信號同時滿足頻率耦合和相位耦合的關(guān)系,這樣的信號在實際中幾乎不存在,很多文獻把取得較好分析效果的原因歸結(jié)于對角切片譜具有識別二次相位耦合的能力,這是不嚴謹?shù)�。提出的二次頻率耦合的概念,相比于二次相位耦合,二次頻率耦合對信號的相位沒有要求。通過理論推導(dǎo)證明了對角切片譜能夠識別僅存在頻率耦合關(guān)系的信號,從而提升了二次相位耦合理論的實用性。最后,通過分析具有內(nèi)圈故障的滾動軸承振動信號,對提出的二次頻率耦合理論進行了驗證。
[Abstract]:The diagonal slice spectrum of the third order cumulant can recognize the quadratic phase coupling relation and restrain the frequency component without coupling. Because of this excellent property, the diagonal slice spectrum has been widely used in the field of signal analysis. However, the definition of quadratic phase coupling requires the original signal to satisfy the relationship between frequency coupling and phase coupling. Many literatures attribute the better analysis results to the ability of diagonal slice spectrum to recognize the quadratic phase coupling, which is not rigorous. Compared with the quadratic phase coupling, the quadratic frequency coupling has no requirement for the signal phase. It is proved by theoretical derivation that diagonal slice spectrum can recognize signals with only frequency coupling relation, which improves the practicability of quadratic phase coupling theory. Finally, the secondary frequency coupling theory is verified by analyzing the vibration signal of rolling bearing with inner ring fault.
【作者單位】： 西南交通大學(xué)機械工程學(xué)院;西南交通大學(xué)牽引動力國家重點實驗室;
【基金】：國家自然科學(xué)基金資助項目(51375403,51478399) 中國博士后科學(xué)基金資助項目(2015M582565,2016T90709)
【分類號】：TN911.6
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本文編號：2331256