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采用时频矩阵奇异值分解的配电开关振动信号特征量提取方法

DOI: 10.13334/j.0258-8013.pcsee.2014.28.028, PP. 4990-4997

Keywords: 配电开关,振动信号,特征量提取,时频矩阵,奇异值分解,HHT带通滤波,模糊c均值聚类

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Abstract:

配电开关振动信号具有非线性非平稳特性,蕴含有机械状态信息。提出一种采用时频矩阵奇异值分解的配电开关振动信号特征量提取方法,对振动信号做希尔伯特-黄变换以进行带通滤波,构造其时频矩阵,对该矩阵进行奇异值分解,可将振动信号的特征信息分解到不同的时频子空间,以得到的时频矩阵奇异值作为振动信号的特征量,用于表征配电开关的机械状态。对配电开关在正常及卸掉A相触头绝缘拉杆、机械结构卡涩、底座螺丝松动等3种典型故障情况下实测振动信号的时频矩阵奇异值做模糊c均值聚类,结果表明该特征量能够准确、有效地表征配电开关的机械状态。

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