中国电力 ›› 2016, Vol. 49 ›› Issue (8): 69-73.DOI: 10.11930/j.issn.1004-9649.2016.08.069.05

• 新能源 • 上一篇    下一篇

风机齿轮箱振动信号的稀疏傅里叶变换分析

赵洪山1,高夺2,张健平2   

  1. 1. 华北电力大学 电气与电子工程学院,河北 保定 071003;
    2. 国网沧州供电公司,河北 沧州 061000
  • 收稿日期:2016-02-15 出版日期:2016-08-10 发布日期:2016-08-12
  • 通讯作者: 国家自然科学基金资助项目(51277074)
  • 作者简介:赵洪山(1965—),男,河北沧州人,教授,从事电力设备在线监测与故障诊断和电力设备优化维修策略的研究。

Analysis of Sparse Fourier Transform for Vibration Signal of Wind Turbine Gearbox

ZHAO Hongshan1, GAO Duo2, ZHANG Jianping2   

  1. 1. Electrical and Electronic Engineering Institute, North China Electric Power University, Baoding 071003, China;
    2. State Grid Cangzhou Electric Power Company, Cangzhou 061000, China
  • Received:2016-02-15 Online:2016-08-10 Published:2016-08-12
  • Contact: This work is supported by National Natural Science Foundation of China (No. 51277074).

摘要: 风电机组齿轮箱振动信号的在线频谱分析对信号处理算法的快速性要求很高,提出采用稀疏快速傅里叶变换(SFFT)算法进行风机齿轮箱的频谱分析。SFFT算法主要利用窗函数过滤信号,然后散列傅里叶系数,最后进行定位与估值运算,能快速地计算出信号频谱中k(信号的稀疏度)个拥有最大值的傅里叶系数。该算法结构简单,运行时间相对于信号长度n呈亚线性。通过对风电机组齿轮箱的实际振动信号分析,验证了SFFT算法较之FFT算法运行速度快,非常适合振动信号的在线频谱分析。

关键词: 风电机组, 齿轮箱, 振动信号, 频谱分析, 稀疏快速傅里叶变换

Abstract: The on-line spectrum analysis for vibration signal of wind turbine gearbox demands fast algorithms. In order to improve the speed of the algorithm, the spectrum analysis with Sparse Fast Fourier Transform (SFFT) algorithm is proposed in this paper. First, the SFFT algorithm is used to leverage the window function to filter vibration signal. Then, after the Fourier coefficients being hashed, the k largest (in magnitude) coefficients of the Fourier Transform of vibration signal can be estimated by locating and estimating methods. The SFFT algorithm has a simple structure and a sub-linear runtime in the signal size n. It has been verified through analyzing the vibration signal of wind turbine gearbox that the SFFT algorithm has a faster performance than FFT algorithm in on-line spectrum analysis.

Key words: wind turbine, gearbox, vibration signal, spectrum analysis, Sparse Fast Fourier Transform

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