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The rate of change of diagnostic features (vibration parameters) is uniquely determined by the weighted sum of the rates of change of relevant errors of the unit. The rates of change of vibration parameter trends supplement the space of orthogonal diagnostic features that enables to increase the reliability of diagnosing and reduce diagnostic error.
Numerous acts of failure of various mechanisms of the units, which were investigated by the analysis of vibration parameter trends, are exponential. Exponential trends of malfunction development on a short interval of time make up a group of sudden failures of equipment that cause significant economic and environmental losses in petrochemical complexes.
Growth rates of vibration parameters and vibration parameter values are independent diagnostic features. The use of growth rates of vibration parameters as independent diagnostic feature put a new spin on the diagnostics. It is confirmed by the patents and vibration standards for safe operation of the units of petrochemical complexes, which well in advance anticipated the boldest suggestions for vibration normalization.
Kostyukov V.N., Kostyukov Al.V. Diagnostics and prediction of condition of the units of petrochemical complexes by vibration parameter trends // Omsk Research Bulletin. - Omsk: 2001. - № 17. - p. 109-112  Download the publication
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