摘要石油是我们生活中必不可少的一种资源，随着我国石油工业的发展和石油开发的需要，潜油电泵作为一种重要的机械采油设备得到了认可。他的可靠性和高效性是油田持续稳产高产的重要保证。潜油电泵机组的组成较为复杂，工作环境恶劣，发生故障会引起机组的振动，而机组的振动状态在一定程度上反映了机组各个部件的真实运行情况。我们可以从机组振动信号中提取有用的特征信息，完成对故障的诊断。52346

    本文通过对潜油电泵机组的振动信号进行研究，实现对故障特征的提取，并对特征参数的分类能力经行判定。首先利用时域波形、小波分解等方法对已经获得振动信号进行分析平均值、方差、偏度、峭度、概率密度、相关函数最大值、傅里叶变换、实倒谱参数，得出潜油电泵振动加速度特征参数的提取方法并分析特征参数。最后根据基于距离的分类能力的判定方法对提取的特征进行分类能力鉴定。最后说明那个特征最好。

毕业论文关键词：潜油电泵机组、故障诊断、振动信号、特征参数

Abstract Oil is in our lives indispensable one kinds resource, as China's petroleum industry's development and oil development the needs of, the latent the oil electric pump as an one kinds important mechanical oil extraction equipment been recognized. His the reliability and efficient Xing yes oilfield sustained high and stable yield's important guarantee. Submersible pump unit composition is more complex, poor working conditions, failure will cause vibration of the unit, while the unit vibration state to some extent, reflect the various components of the unit's real operating conditions. We can see from aircrew vibration signal extract useful feature information, the completion of pairs of fault diagnosis.

  Based on the submersible pump unit to study the vibration signal, to realize the fault feature extraction and classification capability characteristic parameters determined by the line. First, the use of time-domain waveform, wavelet decomposition method has gained vibration signal mean, variance, skewness, kurtosis, probability density correlation function maximum, Fourier transform, the real cepstrum parameters derived submersible pump vibration acceleration characteristic parameter extraction method and analyzed parameters. Finally, according to the distance-based classification method for determining the ability of the extracted features for classification capability identification. Finally, we illustrate the features of the best..

Keywords: electric submersible pump (ESP)、 fault diagnosis、 vibration signal、 characteristic parameter collect 

目录

第一章 绪论 10

1.1概述 10

1.2选题的背景及意义 11

1.3 国内外研究状况及问题 12

1.4故障研究方法 13

1.5课题研究的主要内容 14

第二章 振动信号的检测原理 15

2.1压电传感器对三维振动信号的检测 15

2.2石英压电式传感器简介 16

第三章 建立潜油电泵偏磨的力学模型 18

3.1潜油电泵的力学模型 18

3.2潜油电泵偏磨震动的力学分析 19

第四章 利用MATLAB对震动信号进行分析的原理 22

4.1MATLAB简介 22

4.2振动信号分析原理