Abstract:The local characteristic-scale decomposition is an effective adaptive decomposition method, which has been widely applied in the diagnosis of rotating mechanical faults, such as bearing and gear faults.In order to improve the decomposition quality, an end-effect suppression method was given based on the mixed interpolation and polynomial correction.First, the data segment of the endpoint neighborhood was linearly interpolated by means of mean point data.Next, the mean curve of the endpoint neighborhood was combined with the middle data segment, and the mean curve was formed according to the third order spline interpolation.Then, the mean curve of the endpoint neighborhood was corrected by the cubic polynomial method, and the smoothness of the resulting component was guaranteed.The analysis results of the simulated data and real bearing fault data show that the method can restrain the end-effect of local characteristic-scale decomposition effectively.
收稿日期: 2017-09-07
出版日期: 2018-11-15
引用本文:
张征1,崔伟成2. 基于混合插值与多项式修正的局部特征尺度分解端点效应抑制方法[J]. 振动与冲击, 2018, 37(22): 181-186.
ZHANG Zheng1,CUI Weicheng2. Mothod for restraining the end-effect of local characteristic-scale decomposition based on the mixed interpolation and polynomial correction. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(22): 181-186.
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