• CN:11-2187/TH
  • ISSN:0577-6686

›› 2012, Vol. 48 ›› Issue (13): 102-107.

• 论文 • 上一篇    下一篇

基于椭圆Fourier描述子的旋转机械振动信号分析

杨彦利;苗长云;伉大俪   

  1. 天津工业大学电子与信息工程学院;大连圣力来监测技术有限公司
  • 发布日期:2012-07-05

Analysis on Vibration Signals of Rotating Machinery Based on Elliptic Fourier Descriptors

YANG Yanli;MIAO Changyun;KANG Dali   

  1. School of Electronics and Information Engineering, Tianjin Polytechnic University Dalian Shenglilai Monitoring Technology Co., Ltd.
  • Published:2012-07-05

摘要: 基于椭圆Fourier描述子,对转子同一截面上相互垂直的两个传感器测取的同源振动信号进行融合分析,从理论上推导出滤波轴心轨迹的表达式。研究对比全谱、全息谱和矢谱,建立三种谱分析方法的统一理论框架,给出三种谱分析方法的理论表达式,并设计利用一次快速Fourier变换实现三种谱图的数值方法。在融合全谱、全息谱和矢谱三种谱分析方法的基础上,提出基于椭圆Fourier描述子的矢椭谱分析方法,用于分析转子的同源振动信号。应用对比验证了矢椭谱的简洁可行性。

关键词: 全谱, 全息谱, 矢谱, 椭圆Fourier描述子, 旋转机械

Abstract: Based on elliptic Fourier descriptors, vibration signals measured from the same section of the orbit by a couple of sensor mounted in radial direction 90º apart are analyzed in data fusion. The theoretical expression of filtered orbit is derived. The full spectrum, the holospectrum, and the vector spectrum are compared, a general theoretical framework for these three kinds spectrum is proposed, and a numerical method to obtain these three kinds spectrum by one Fourier transform is designed. The vector ellipse spectrum which is synthesized by the full spectrum, the holospectrum, and the vector spectrum is proposed as a new method to analyze synchronous vibration signals. The comparison shows that the vector ellipse spectrum is simple and feasible.

Key words: Elliptic Fourier descriptors, Full spectrum, Holospectrum, Rotating machinery, Vector spectrum

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