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Purification and feature extration of shaft orbits for diagnosing large rotating machinery

journal contribution
posted on 2023-06-09, 09:36 authored by D F Shi, William WangWilliam Wang, P J Unsworth, L S Qu
Vibration-based diagnosis has been employed as a powerful tool in maintaining the operating efficiency and safety for large rotating machinery. However, due to some inherent shortages, it is not accurate enough to extract the features of malfunctions by using traditional vibration signal processing techniques. In this paper, a high-resolution spectrum is firstly proposed to calculate the amplitude, frequency and phase details of sinusoidal harmonic and sub-harmonic vibration in large rotating machinery. Secondly, on the basis of a high-resolution spectrum, a purified shaft orbit is reconstructed to remove the interference terms. The moment and curve features, which are invariant to translation, scaling and rotation of the shaft orbit, are introduced to extract the features from the purified vibration orbit. This novel scheme is shown to be very effective and reliable in diagnosing several types of malfunctions in gas turbines and compressors under operating conditions as well as in the run-up stages.

History

Publication status

  • Published

File Version

  • Published version

Journal

Journal of Sound and Vibration

ISSN

0022-460X

Publisher

Elsevier

Issue

3-5

Volume

279

Page range

581-600

Department affiliated with

  • Engineering and Design Publications

Research groups affiliated with

  • Dynamics, Control and Vehicle Research Group Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2018-01-04

First Compliant Deposit (FCD) Date

2018-01-03

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