Switching Mechanism of Internal Model Control-based PI Controller for Lag Dominating Processes

摘要

A good numbers of industrial processes are found to be lag dominating in nature.To obtain desirable closed-loop response for such processes,internal model control(IMC)technique with switching behavior is reported here.Initial setting of the reported PI controller is obtained through SIMC technique[1].Here,the proposed scheme is based on switching between smooth control and tight control methodologies of IMC tuning depending on the instantaneous process operating conditions.Superiority of the proposed technique is verified through simulation study on lag dominating process models with the help of MATLAB/SIMULINK toolbox.