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Condition monitoring of a steam turbine generator using wavelet spectrum based control chart

Title
Condition monitoring of a steam turbine generator using wavelet spectrum based control chart
Author
배석주
Keywords
Condition-based maintenance; Hurst exponent; T-2 chart; Preventive maintenance; Regression; Wavelet spectrum analysis
Issue Date
2019-04
Publisher
ELSEVIER SCI LTD
Citation
RELIABILITY ENGINEERING & SYSTEM SAFETY, v. 184, NO Special SI, Page. 13-20
Abstract
Condition-based maintenance (CBM) is designed to take maintenance actions only when there is an imminent evidence of failure for a monitoring system. The parameters indicating health status of the system are continuously monitored in CBM. This article proposes a condition monitoring scheme based on energy profiles generated from wavelet spectrum analysis. The energy of time series is represented by a wavelet spectrum in scale representations of signals. After deriving wavelet spectrums using a discrete wavelet transform at pre-specified windows, we aim to monitor the system based on multivariate T-2 chart for the parameters in the linear energy profiles. The monitoring scheme is applied to temperature signals measured from a steam turbine generator. The proposed T-2 chart based on the energy profiles shows a potential in early detecting the abnormality of a monitoring system which is not clearly detectable in original time scales. (C) 2017 Elsevier Ltd. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0951832016310018?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/122133
ISSN
0951-8320; 1879-0836
DOI
10.1016/j.ress.2017.09.025
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > INDUSTRIAL ENGINEERING(산업공학과) > Articles
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