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旋转机械非稳定信号的伪转速跟踪阶比分析
引用本文:郭瑜,秦树人.旋转机械非稳定信号的伪转速跟踪阶比分析[J].振动与冲击,2004,23(1):61-64,69.
作者姓名:郭瑜  秦树人
作者单位:重庆大学,机械学院测试中心,重庆,400044
基金项目:国家自然科学基金重点资助项目 (批准号 :50 1 350 50 )
摘    要:旋转机械非稳定信号阶比分析技术,是旋转机械特征分析的重要内容。本文提出并介绍了用时频分析技术中的瞬时频率估计实现伪转速跟踪阶比分析的方法。和传统方法相比,本方法无需转速计和鉴相装置等辅助硬件手段,简化了阶比分析的实现。介绍了借助本方法实现的阶比谱、阶比谱阵和跟踪阶比谱等阶比分析技术的方法,并通过实际测试验证了其有效性。本方法是对已有方法的有力补充,特别适合虚拟测试仪器发展的要求。

关 键 词:旋转机械  非稳定信号  伪转速跟踪阶比分析  瞬时频率估计  虚拟仪器  故障诊断  特征分析

Pseudo-Speed Tracking Order Analysis for Non-Stationary Vibration Signals of Rotating Machinery
Guo Yu,Qin Shuren.Pseudo-Speed Tracking Order Analysis for Non-Stationary Vibration Signals of Rotating Machinery[J].Journal of Vibration and Shock,2004,23(1):61-64,69.
Authors:Guo Yu  Qin Shuren
Abstract:Order analysis plays an important role in non-stationary vibration signal processing in rotating machinery.It is a major content in character analysis of rotating machinery.A method for speed tracking,which employs instantaneous frequency estimation based on time-frequency analysis of signal,is introduced in the paper.In contrast with traditional methods,the use of tachometer and other special hardwares is avoided in the mothod so the application of order analysis is simplified.The analysis techniques of order spectrum,order spectrum matrix and tracking order spectrum etc,are also introduced.An actual test was done to show the validity of the method.It is a strong supplement to traditional methods and suit for the requirment due to the development of virtual instruments.
Keywords:order analysis  rotating machinery  instantaneous frequency estimation  time-frequency analysis  virtual instrument
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