Abstract
This article presents the design of an exponential state estimator for a distillation column. The proposed algorithm mainly estimates the imprecisely known parameters based on the available measurements. For the example distillation column, the nonlinear state estimator is formed with two component material balance equations; one is around the condenser-reflux drum system and the other one is around the reboiler-column base system. As a result, there is an excessive process/model mismatch. In this situation, the proposed scheme estimates the augmented states with sufficient accuracy. The simulation experiments have been performed to investigate the convergence ability of the estimator. The less computational requirements and simple design make the estimator attractive for online use.
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