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Bearing fault diagnosis method based on adaptive maximum cyclostationarity blind deconvolution

机译：基于自适应最大循环旋底盲卷积的轴承故障诊断方法

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Blind deconvolution has been proved to be an effective method for fault detection since it can recover periodic impulses from mixed fault signals convoluted by noise and periodic impulses. As a new blind deconvolution technique, maximum cyclostationarity blind deconvolution (CYCBD) has great advantages over minimum entropy deconvolution (MED), maximum correlation kur-tosis deconvolution (MCKD), and optimal minimum entropy deconvolution (MOMEDA) in processing bearing fault signals. However, CYCBD has the following two defects: Cyclic frequency needs to be determined in advance; The filter length of CYCBD affects its ability to recover impulses. The ability of CYCBD to recover the impulse will increase with the increase of filter length, but the signal will be distorted if the length is too large. Besides, the time cost will increase significantly after the length is increased. In this paper, an optimization strategy of CYCBD parameters is proposed, and then an adaptive maximum cyclostationarity blind deconvolution (ACYCBD) is proposed. Firstly, aiming at the determination of cyclic frequency, this paper proposes a cyclic frequency set estimation method based on autocorrelation function of morphological envelope, and the validity of the method is verified by simulation and experiment. Secondly, for the second problem, after considering the performance and time cost of CYCBD, the performance efficiency ratio index is proposed. Then, the equal-step search strategy is used to adaptively select the filter length. Finally, the effectiveness of the method is verified by simulation and experiment.
机译：被证明是一种有效的故障检测方法，因为它可以从噪声和周期性脉冲旋转的混合故障信号中恢复周期性脉冲。作为一种新的盲卷积技术，最大循环静态盲卷积（Cycbd）在最小熵卷积（MED），最大相关Kur-tens折叠卷积（McKD）以及加工轴承故障信号中的最佳最小熵解卷（Momeda）具有很大的优势。然而，Cycbd具有以下两种缺陷：需要提前确定循环频率; Cycbd的过滤器长度影响其恢复脉冲的能力。 Cycbd恢复脉冲的能力将随着滤波器长度的增加而增加，但如果长度太大，则信号将被扭曲。此外，在长度增加后，时间成本将显着增加。在本文中，提出了一种Cycbd参数的优化策略，提出了一种自适应最大循环旋段盲卷积（ACYCBD）。首先，旨在确定循环频率的确定，本文提出了一种基于形态包络自相关函数的循环频率设定估计方法，通过模拟和实验验证了该方法的有效性。其次，对于第二个问题，在考虑Cycbd的性能和时间成本后，提出了性能效率比率指数。然后，使用相等的搜索策略来自适应地选择滤波器长度。最后，通过模拟和实验验证了该方法的有效性。

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