Two-Layered Predictive Control Strategy of Coagulant Dosing Systems

According to the characteristics of large delay, large inertia and nonlinear of coagulant dosage, a two-layered predictive control strategy is proposed for the coagulant dosing systems. Model predictive controller (MPC) calculation is separated into steady-state and dynamic optimization, through the objective function to reflect economic performance. The proposed method only requires little information of the controlled plant, and its algorithm is simple, easy to implement. Theoretical analysis and simulation results show that this method reduces operating costs and achieve maximum economic efficiency.