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Model-based leakage detection in a pulverized coal injection vessel

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2 Author(s)
Johansson, A. ; Lulea Univ. of Technol., Sweden ; Medvedev, A.

A method for detecting and isolating incipient leakages in the valves of a pulverized coal injection vessel for a blast furnace process is presented. Nonlinear physical gray-box models of the plant are developed. Values of the unknown parameters are estimated by identification. Observers are constructed for these models and the residuals are used in a generalized likelihood ratio test. The method is successfully tested with real leakages intentionally introduced in the plant

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Control Systems Technology, IEEE Transactions on  (Volume:7 ,  Issue: 6 )