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Model-Free Sliding Mode and Fuzzy Controllers for Reverse Osmosis Desalination Plants

Sasa Vrkalovic, Elena-Cristina Lunca, Ioan-Daniel Borlea


This paper presents model-free sliding mode controllers and Takagi-Sugeno fuzzy controllers for the flux and conductivity control of Reverse Osmosis Desalination Plants (RODPs). The RODPs are Multi Input-Multi Output processes and two separate controllers are designed in Single Input-Single Output control systems. The design of the model-free sliding mode controllers is done by Lyapunov’s stability theory. The Takagi-Sugeno fuzzy controllers are designed by considering linear matrix inequalities as constraints in an optimization problem solved by a Grey Wolf Optimizer algorithm. Simulation results are included.


fuzzy control, Grey Wolf Optimizer algorithm, linear matrix inequalities, model-free sliding mode control, reverse osmosis desalination plants, stability.

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