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Series cascade control structure (SCCS) is widely used in process industries as unity feedback configuration fails to reject the load disturbances before the controlled variable deviates from the setpoint. Several variants of the conventional SCCSs have been reported in the literature to obtain improved closed-loop performance as compared to the conventional structure. For processes with large time...
A number of tuning rules have been reported in literature for unstable first order plus time delay processes. However, at least to the author knowledge most of the reported methods fail to give robust performance for process models with time delay equal to or greater than the process time constant. In this work, a robust tuning method based on the modified Smith predictor is proposed for unstable...
In process industries, cascade control is one of the commonly used techniques to improve the performance of a single loop control structure when there are disturbances associated with the manipulated variable. In the present work, tuning rules have been proposed for series cascade control structure considering stable and integrating process models with time delay. The primary controller is a Proportional-Integral-Derivative...
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