Enhanced predictive ratio control of interacting systems |
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Authors: | Minh HT Nguyen |
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Affiliation: | Department of Electrical Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576, Singapore |
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Abstract: | Ratio control for two interacting processes is proposed with a PID feedforward design based on model predictive control (MPC) scheme. At each sampling instant, the MPC control action minimizes a state-dependent performance index associated with a PID-type state vector, thus yielding a PID-type control structure. Compared to the standard MPC formulations with separated single-variable control, such a control action allows one to take into account the non-uniformity of the two process outputs. After reformulating the MPC control law as a PID control law, we provide conditions for prediction horizon and weighting matrices so that the closed-loop control is asymptotically stable, and show the effectiveness of the approach with simulation and experiment results. |
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Keywords: | Ratio control PID Model predictive control Interacting system |
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