期刊
EKSPLOATACJA I NIEZAWODNOSC-MAINTENANCE AND RELIABILITY
卷 22, 期 3, 页码 520-529出版社
POLISH MAINTENANCE SOC
DOI: 10.17531/ein.2020.3.15
关键词
system failure threshold; residual life; similarity; prognostics; oil field data
资金
- NSFC [51975047]
- China Scholarship Council [201806030083]
An accurate determination of the system failure threshold is an essential requirement in achieving an appropriate system residual life prediction and a reasonable planned maintenance strategy optimization afterward for degradation systems. This paper proposes a failure threshold determination method based on quantitative measurement of the similarity between the operating system and the historical systems. The similarity is formulated by a weighted average function and then calculated by a convex quadratic formulation to minimizing the variance between the operating system and the historical systems. With an accurate determination of the system failure threshold in real-time, a better prediction of the residual life for the operating system is achieved. Finally, a real case study for several power-shift steering transmission systems monitored using oil spectral analysis is adopted to illustrate and numerically compare the improved performance of the proposed method.
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