Novel Analytical Dead Time Compensator Design for Challenging Non–Self‐Regulating Chemical Processes

ABSTRACT The control challenges upturn if the non–self‐regulating (integrating) processes include process time delay, double poles at the origin, and inverse behavior. None of the existing literature has considered all the above‐mentioned types of processes in the frame of a unified control method. In this manuscript, a novel PD‐PID–based dead time compensator is developed for a wide range of difficult integrating systems to achieve satisfactory performance and enhanced robustness against unwanted disturbance variables and process uncertainties. Analytical relations are derived for the inner and outer loop controllers using the direct synthesis approach. Further, suitable recommendations are made to choose the appropriate value of the tunable constants so that the robustness constraints are satisfied. The efficacy of the developed control laws is justified by implementing them on various case studies through numerical simulations and theoretical analysis. The suggested method is found capable of mitigating the effect of ramp‐type disturbances also in addition to the step disturbance.