[1]杨龙兴,贾民平,许飞云,等.旋转机械故障的循环平稳度诊断[J].东南大学学报(自然科学版),2003,33(4):438-441.[doi:10.3969/j.issn.1001-0505.2003.04.014]
 Yang Longxing,Jia Minping,Xu Feiyun,et al.Rotary machine faults diagnosis using the degree of cyclostation[J].Journal of Southeast University (Natural Science Edition),2003,33(4):438-441.[doi:10.3969/j.issn.1001-0505.2003.04.014]
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旋转机械故障的循环平稳度诊断()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
33
期数:
2003年第4期
页码:
438-441
栏目:
信息与通信工程
出版日期:
2003-07-20

文章信息/Info

Title:
Rotary machine faults diagnosis using the degree of cyclostation
作者:
杨龙兴12 贾民平1 许飞云1 钟秉林1
1 东南大学机械工程系,南京 210096; 2 江苏技术师范学院机械工程系,常州 213001
Author(s):
Yang Longxing12 Jia Minping1 Xu Feiyun1 Zhong Binglin1
1 Department of Mechanical Engineering, Southeast University, Nanjing 210096, China
2 Department of Mechanical Engineering, Jiangsu Teacher’s College of Technology, Changzhou 213001, China
关键词:
旋转机械故障 循环平稳度 调幅型故障 二阶循环矩的FFT估计
Keywords:
rotary machine faults degree of cyclostation amplitude modulation faults FFT estimation of second-order cyclic moment
分类号:
TN911;TP206
DOI:
10.3969/j.issn.1001-0505.2003.04.014
摘要:
根据旋转机械信号循环平稳特性,以及故障出现后非平稳特征渐强的特点,提出了相对及绝对循环平稳度的概念,通过理论分析,提取出对旋转机械故障较为敏感的相对循环平稳指标.在此基础上又提出了通过对信号x(t)及其共轭乘积进行Fourier变换,代入循环频率α值获取循环自相关函数Rαxx(0)的方法,并利用本方法对不同调幅系数的正弦信号和氧压机小偏心量调幅故障信号,进行了仿真和实例验证,证明了指标的有效性.
Abstract:
This paper introduces an approach of relative degree of cyclostation and absolute degree of cyclostation by analyzing characteristics of rotary machine signals which exhibit cyclostationarity. A sensitive target of relative cyclostation for rotary machine faults is extracted by theory analysis while rotary machine signals get more non-stationary as a result of more severe faults. To demonstrate the theory, a method is presented from which the value of Rαxx(0)can be acquired by substituting α and FT of signal x(t) multiplying its conjugate. Finally, sine signals with different amplitude modulation coefficients were simulated and a little eccentric amplitude modulation fault of oxygen pressure machine was verified to show the availability.

参考文献/References:

[1] 王宏禹.非平稳随机信号分析与处理[M].北京:国防工业出版社,1999.335-336.
[2] 张贤达,保铮.非平稳信号分析与处理[M].北京:国防工业出版社,1998.328-330.
[3] Dandawate A V,Giannkis B G.Statistical tests for presence of cyclostationary [J]. IEEE Trans on Signal Processing, 1994(42):2355-2369.
[4] Mazet L,Loubaton Ph.Cyclic correlation based symbol rate estimation [A].In:ASICOMAR Conference on Signals,Systems,and Computers [C].1999.1008-1012.
[5] Hurd H L,Gerr N L.Graphical methods for determining the presence of periodic correlation in time series [J]. J Time Series Anal,1991,12(4):337-350.

相似文献/References:

[1]杨龙兴,贾民平.旋转机械故障诊断的1 1/2维循环谱分析方法[J].东南大学学报(自然科学版),2004,34(6):766.[doi:10.3969/j.issn.1001-0505.2004.06.011]
 Yang Longxing,Jia Minping.Analysis method of rotation machinery fault diagnosis using 1 1/2 dimension cyclic spectrum[J].Journal of Southeast University (Natural Science Edition),2004,34(4):766.[doi:10.3969/j.issn.1001-0505.2004.06.011]

备注/Memo

备注/Memo:
基金项目: 国家高技术研究发展计划(863计划)资助项目(2001AA423240).
作者简介: 杨龙兴(1963—),男,博士生,副教授; 贾民平(联系人),男,博士,教授,博士生导师,mpjia@seu.edu.cn.
更新日期/Last Update: 2003-07-20