Source identification of plant-wide faults based on k nearest neighbor time delay estimation |
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Authors: | Markus Stockmann Robert Haber Ulrich Schmitz |
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Affiliation: | 1. Institute of Process Engineering and Plant Design, Laboratory of Process Automation, Cologne University of Applied Sciences, 50679 Cologne, Betzdorfer Str. 2, Germany;2. Shell Deutschland Oil GmbH, Rheinland Raffinerie, 50389 Wesseling, Ludwigshafener Str. 1, Germany |
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Abstract: | The identification of plant-wide faults is a very important topic as it enables plant operators to decrease rejections or to increase the product quality. This paper shows a fault propagation approach for this field of interest based on time delay estimation. Due to the fact that the estimation of time delays in multiple-input single-output systems or nonlinear systems is either impossible or very difficult with known methods, a new method based on k nearest neighbor imputation was developed and is validated in this paper theoretically. The effectiveness of the identification algorithm is demonstrated on several simulations and on an industrial hydrocracker plant. |
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