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首页> 外文期刊>Mechanical systems and signal processing >Constant speed tip deflection determination using the instantaneous phase of blade tip timing data
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Constant speed tip deflection determination using the instantaneous phase of blade tip timing data

机译：使用刀片尖端定时数据的瞬时阶段的恒速尖端偏转确定

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摘要

Blade Tip Timing (BTT) is a non-intrusive measurement technique that can be used to estimate the vibration characteristics of rotor blades during turbomachine operation. BTT uses proximity probes mounted into the turbomachine casing to measure the Time-of-Arrival (ToA) of rotor blades at these proximity probes. The ToAs are determined using a triggering criterion on the proximity probe signal. Rotor blade tip displacements are then calculated from these ToAs. It is therefore imperative that the triggering criterion be as accurate as possible. This article proposes a new method to determine the tip displacement of rotor blades from a proximity probe signal. The method first converts the signal into the angular domain and then obtains the tip deflection through manipulation of the instantaneous phase in the signal. Three experimental tests are conducted where existing triggering criteria are compared to the proposed method. It is found that the proposed method is highly accurate in determining the tip deflections for a constant rotor speed.
机译：刀片尖端定时（BTT）是一种非侵入式测量技术，可用于估计涡轮机操作期间转子叶片的振动特性。 BTT使用安装在涡轮机壳体中的接近探针，测量这些接近探针处的转子叶片的到达时间（TOA）。使用触发标准在接近探测信号上确定TOA。然后从这些TOA计算转子刀片尖端位移。因此，触发标准必须尽可能准确。本文提出了一种新方法来确定转子叶片与接近探针信号的尖端位移。该方法首先将信号转换为角域，然后通过操纵信号中的瞬时相位来获得尖端偏转。进行三种实验测试，其中将现有的触发标准与所提出的方法进行比较。发现该方法在确定恒定转子速度的尖端偏转方面是高度准确的。

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  • 来源
    《Mechanical systems and signal processing》 |2021年第3期|107151.1-107151.17|共17页
  • 作者

    D.H. Diamond; RS. Heyns; A.J. Oberholster;

  • 作者单位

    Centre for Asset Integrity Management Department of Mechanical and Aeronautical Engineering University of Pretoria Pretoria 0002 South Africa;

    Centre for Asset Integrity Management Department of Mechanical and Aeronautical Engineering University of Pretoria Pretoria 0002 South Africa;

    Centre for Asset Integrity Management Department of Mechanical and Aeronautical Engineering University of Pretoria Pretoria 0002 South Africa;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Blade Tip Timing; Triggering criteria; Quadrature filter;

    机译：刀片尖端时间;触发标准;正交过滤器;

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