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Research on an Algorithm and System for Estimation of Instantaneous Frequency of Rotating Machinery

机译：旋转机械瞬时频率估计算法与系统研究

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摘要

Instantaneous frequency is an import parameter to diagnose faults of rotating machinery. This paper puts forward an algorithm based Hilbert-Huang Transformation (HHT) to estimate the instantaneous frequency of rotating machinery and develops an instantaneous cymometer based embedded system technology. In order to estimate instantaneous frequency of rotating machinery, the vibration signal is decomposed into a series of intrinsic mode functions (IMF) first by the method of empirical mode decomposition (EMD), then one of the intrinsic mode functions is analyzed with the Hilbert transformation to acquire an estimate value of instantaneous frequency. An instantaneous cymometer is also described in this paper, which is designed to measure the average frequency and instantaneous frequency of rotating machinery in real time. The average frequency is acquired from measuring the cycle of key-phase signal, and the instantaneous frequency is from the above-mentioned method based HHT. The instantaneous cymometer is consisted of an embedded system, which is connected to a PC with an Ethernet. The embedded system is based on an ARM chip (Samsung S3C4510) A/D conversion, EMD and Hilbert transform are completed on the embedded system, and then the results are compressed and sent to the PC by TCP/IP.
机译：瞬时频率是一种进口参数，以诊断旋转机械的故障。本文提出了一种基于Hilbert-Huang变换（HHT）的算法来估算旋转机械的瞬时频率，开发了一种基于嵌入式的嵌入式系统技术。为了估计旋转机器的瞬时频率，振动信号首先通过经验模式分解（EMD）的方法将振动信号分解为一系列内在模式功能（IMF），然后通过HILBERT转换分析了一个内部模式功能之一获取瞬时频率的估计值。本文还描述了一种瞬时的CyMometer，其旨在实时测量旋转机械的平均频率和瞬时频率。从测量密钥相信号的循环获得平均频率，瞬时频率来自基于HHT的上述方法。瞬时Cymometer由嵌入式系统组成，该系统连接到具有以太网的PC。嵌入式系统基于ARM芯片（三星S3C4510）A / D转换，EMD和HILBERT变换在嵌入式系统上完成，然后通过TCP / IP压缩并将结果进行压缩并发送到PC。

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