广义数学形态滤波器的旋转机械振动信号降噪

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振动与冲击 ›› 2009, Vol. 28 ›› Issue (9) : 70-73.

论文

广义数学形态滤波器的旋转机械振动信号降噪

沈路周晓军张文斌张志刚

作者信息 +

De-noising for vibration signal of rotating machinery based on generalized mathematical morphological filter

SHEN Lu ZHOU Xiaojun ZHANG Wenbin ZHANG Zhigang

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文章历史 +

摘要

针对传统形态滤波器由于采用相同尺寸结构元素而导致的输出统计偏倚严重的问题，提出采用不同尺寸结构元素级联而成的开－闭和闭－开组合广义形态滤波器实现旋转机械振动信号的降噪方法。研究了广义形态滤波器在脉冲噪声与随机噪声干扰下的降噪效果，比较了广义形态滤波器与传统形态滤波器分别对仿真信号与实际振动信号的滤波效果。实例表明，广义数学形态滤波器能够更有效的消除噪声的干扰，获得更高的信噪比。广义形态滤波降噪算法只涉及加减和极大、极小运算，运算简单且执行高效，具有较好的实用价值。

Abstract

Statistic bias occurs because same structure element was used in traditional morphological filter. Based on basic morphological transforms and their combination modes, a generalized morphological filter cascaded by different structure element was proposed to reduce noise of rotating machinery vibration signal. De-noising performance of generalized morphological filter on impulse noise and random noise were investigated. By comparing performance of generalized morphological filter and traditional morphological filter on simulation and practical signal, it is demonstrated that generalized morphology filter could reduce noise more effectively than traditional morphology filter. Generalized morphological filter algorithm includes addition, subtraction, maximum and minimum operations, and does not involve multiplication and division. Therefore, it has high calculation speed and better application value.

导出引用

沈路周晓军张文斌张志刚. 广义数学形态滤波器的旋转机械振动信号降噪 [J]. 振动与冲击, 2009, 28(9): 70-73

SHEN Lu ZHOU Xiaojun ZHANG Wenbin ZHANG Zhigang. De-noising for vibration signal of rotating machinery based on generalized mathematical morphological filter[J]. Journal of Vibration and Shock, 2009, 28(9): 70-73