![]() The conducted real time experiments on the industrial plant show that the FLC system outperforms the existing model-based fuzzy parallel distributed control system in an increased dynamic accuracy and a reduced settling time. The novelty is the design of a single-input-single-output FLC, the FLC transformation to enable its programming in a PLC and implementation of the PLC-FLC for the real time control of the level in a carbonisation column in “Solvay Sodi” SA – Devnya, Bulgaria. The aim of the present investigation is to design and implement a model-free FLC for the liquid level in a carbonisation column in soda ash production using a low-cost general purpose industrial programmable logic controller (PLC). Despite the rapid theoretical development the reported FLC industrial applications are still only few. ![]() ![]() The fuzzy logic controller (FLC) successfully ensures control system stability, robustness and desired performance in the whole range of plant operation. The Honeywell Suite packages all of Kepwares connectivity options for Honeywell PLCs for one low price. The linear control techniques often fail to satisfy the high standards in the control of the contemporary complex plants accounting for the emerging importance of the plant nonlinearity, model uncertainty, variables coupling and disturbances from the industrial environment.
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