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This manuscript presents a modified parallel cascade control structure (PCCS) with Smith predictor for open loop unstable and integrating process models with large time delay. The proposed PCCS consists of a secondary disturbance rejection controller, a primary stabilizing controller and a primary setpoint tracking controller. Parameters of the setpoint tracking controller are obtained by equating...
This manuscript presents a modified parallel cascade control structure (PCCS) for a class of stable, unstable and integrating process models with time delay. The proposed PCCS consists of three controllers. Internal Model Control (IMC) approach is used to design the disturbance rejection controller in the secondary loop. Parameters of the proportional-integral (PI) controller which is used for setpoint...
Conventional parallel cascade control structure (PCCS) does not yield satisfactory closed-loop performance for processes with large time delay. To overcome this limitation, this manuscript presents a modified Smith delay compensator based PCCS. Stable, integrating and unstable processes with dead time are considered in this work. The proposed PCCS consists of a secondary disturbance rejection controller,...
In process industries, parallel cascade control structures are widely used to improve the dynamic performance in the presence of disturbances. Majority of the parallel cascade tuning strategies reported in the literature focuses on stable process models. Hence, this article presents an improved tuning strategy for time delayed integrating process models. The proposed parallel cascade control structure...
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