Abstract

TELLEZ-ANGUIANO, A.C. et al. Continuous-Discrete Observer-based fault detection and isolation system for distillation columns using a binary mixture. Rev. Mex. Ing. Quím [online]. 2016, vol.15, n.1, pp.275-290. ISSN 1665-2738.

In this work a Fault Detection and Isolation (FDI) system is presented. The FDI system detects simultaneous failures in the temperature sensors placed in a distillation column. The distillation column is used to separate an Ethanol-Water binary mixture. The estimated temperature is used as the reference variable in the FDI system. This system is based on a continuous-discrete high-gain observer. This observer is an extension of the continuous-time constant-gain observer developed for systems having a triangular form, such as distillation columns. The continuous-discrete observer is selected to deal with the problem of performing a continuous estimation of the system without exceeding the available computational capabilities. The proposed FDI system has a dynamic behavior that allows detecting transitory failures as well as determining their magnitude. The developed FDI system was a experimentally validated on-line, providing use full information that allows the user to make early decisions when a failure occurs.

Keywords : nonlinear system; continuous-discrete observer; fault detection and isolation system; distillation column.

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