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Unscented Kalman Filtering of a Simulated pH System
Romanenko, Andrey; Santos, Lino O.; Afonso, Paulo A. F. N. A.Recently, the unscented Kalman filter (UKF) algorithm, which is a new generalization of the Kalman filter for nonlinear systems, was proposed in the literature. It has significant advantages over its widely used predecessor, the extended Kalman filter (EKF). These include better accuracy and simpler implementation and the dispensability of system and measurement model differentiability. In this work, we compare...
On-line implementation of nonlinear MPC: an experimental case study
Santos, Lino O.; Afonso, Paulo A. F. N. A.; Castro, José A. A. M.; Oliveira, Nuno M. C.; Biegler, Lorenz T.A nonlinear model predictive control algorithm is implemented on-line to control the liquid level and temperature in a pilot plant CSTR, where an irreversible exothermic chemical reaction is simulated experimentally by steam injection. The dynamic behavior of the pilot plant reactor is represented using a mechanistic, first principle model and a comparison between off-line simulation and experimental data is pr...
Improving safety of a pilot reactor using a model based fault detection and ide...
Afonso, Paulo A. F. N. A.; Tavares, João M.; Castro, José A. A. M.This work describes the experimental implementation of an automatic scheme for the on-line detection and identification (FDI) of faults in the sensors of an industrial scale pilot plant reactor under process control, where a pseudo zero-order exothermic chemical reaction is partially simulated. The main goals of this research are to enhance the safety of reactor operations and to demonstrate the potential of FD...
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