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为排除转子系统故障诊断中各种噪声干扰,提出基于局域波分解尺度滤波来提纯轴心轨迹的方法,并给出尺度滤波的滤波器表达式.局域波法将任何复杂信号分解成为有限数目的具有一定物理意义的基本模式分量(IMFs),每一个分量描述时变信号中不同频率和尺度范围的固有振动模式.通过对加噪信号的有效去噪,检验了尺度滤波的可行性.诊断实例说明,该方法可合理、有效地提取转子系统的故障特征.
In order to eliminate all kinds of noise disturbances in the fault diagnosis of rotor system, a new method to purify the axis locus based on the decomposition of local wave decomposition scale is proposed and the filter expression of the scale filter is proposed.Local wave method decomposes any complex signal into finite The number of basic mode components (IMFs) of a certain physical meaning, each of which describes the natural modes of vibration at different frequencies and scales in a time-varying signal.Through the effective denoising of the noisy signal, the feasibility of the scale filtering is tested. The diagnosis example shows that this method can reasonably and effectively extract the fault characteristics of the rotor system.