Petroleum Pumps’ Current and Vibration Signatures Analysis Using Wavelet Coherence Technique

Q2 Physics and Astronomy

Advances in Acoustics and Vibration Pub Date : 2013-06-12 DOI:10.1155/2013/659650

R. Shnibha, A. Albarbar

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引用次数: 4

Abstract

Vibration analysis is widely used for rotating machinery diagnostics; however measuring vibration of operational oil well pumps is not possible. The pump’s driver’s current signatures may provide condition-related information without the need for an access to the pump itself. This paper investigates the degree of relationship between the pump’s driver’s current signatures and its induced vibration. This relationship between the driver’s current signatures (DCS) and its vibration signatures (DVS) is studied by calculating magnitude-squared coherence and phase coherence parameters at a certain frequency band using continuous wavelet transform (CWT). The CWT coherence-based technique allows better analysis of temporal evolution of the frequency content of dynamic signals and areas in the time-frequency plane where the two signals exhibit common power or consistent phase behaviour indicating a relationship between the signals. This novel approach is validated by experimental data acquired from 3 kW petroleum pump’s driver. Both vibration and current signatures were acquired under different speed and load conditions. The outcomes of this research suggest the use of DCS analysis as reliable and inexpensive condition monitoring tool, which could be implemented for oil pumps, real-time monitoring associated with condition-based maintenance (CBM) program.

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基于小波相干技术的石油泵电流和振动特征分析

振动分析在旋转机械诊断中应用广泛;然而，对运行中的油井泵进行振动测量是不可能的。泵的驱动程序的当前签名可以提供与条件相关的信息，而不需要访问泵本身。本文研究了泵的驱动电流特征与其诱发振动的关系程度。利用连续小波变换(CWT)计算某一频段的幅值平方相干和相位相干参数，研究了驱动电流特征(DCS)与振动特征(DVS)之间的关系。基于CWT相干的技术可以更好地分析动态信号的频率内容的时间演变，以及两个信号在时频平面上表现出共同功率或一致相位行为的区域，表明信号之间的关系。通过3kw油泵驱动器的实验数据验证了该方法的有效性。得到了不同转速和负载条件下的振动和电流特征。本研究的结果表明，DCS分析可以作为可靠且廉价的状态监测工具，用于油泵的实时监测，并与状态维护(CBM)程序相关联。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Advances in Acoustics and Vibration ACOUSTICS-

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期刊介绍： The aim of Advances in Acoustics and Vibration is to act as a platform for dissemination of innovative and original research and development work in the area of acoustics and vibration. The target audience of the journal comprises both researchers and practitioners. Articles with innovative works of theoretical and/or experimental nature with research and/or application focus can be considered for publication in the journal. Articles submitted for publication in Advances in Acoustics and Vibration must neither have been published previously nor be under consideration elsewhere. Subject areas include (but are not limited to): Active, semi-active, passive and combined active-passive noise and vibration control Acoustic signal processing Aero-acoustics and aviation noise Architectural acoustics Audio acoustics, mechanisms of human hearing, musical acoustics Community and environmental acoustics and vibration Computational acoustics, numerical techniques Condition monitoring, health diagnostics, vibration testing, non-destructive testing Human response to sound and vibration, Occupational noise exposure and control Industrial, machinery, transportation noise and vibration Low, mid, and high frequency noise and vibration Materials for noise and vibration control Measurement and actuation techniques, sensors, actuators Modal analysis, statistical energy analysis, wavelet analysis, inverse methods Non-linear acoustics and vibration Sound and vibration sources, source localisation, sound propagation Underwater and ship acoustics Vibro-acoustics and shock.