Design of a performance-driven model predictive PID controller

PID controllers have been widely used for various process control systems represented by chemical processes. Recently, from viewpoint of productivity improvement and cost reduction, it has demands to establish the PID controller retained a desirable performance over time on steady-state in spite of changes in the system property. In this paper, a design of performance-driven model predictive PID controller is proposed, which automatically adjusts the user-specified parameter within the GPC-PID controller based on the control performance assessment. According to the proposed algorithm, the PID controller is re-tuned in order to obtain desirable system performance only if the practically performance index to assess control loop exceeds a user-defined threshold. The effectiveness of the proposed control scheme is numerically evaluated by a computer simulation example.