Controller design on a new 2DOF PID structure for different processes having integrating nature for both the step and ramp type of signals

Dipjyoti Das, Sudipta Chakraborty and Asim Kumar Naskar

International Journal of Systems Science, 2023, vol. 54, issue 7, 1423-1450

Abstract: Chemical reactors, heat exchangers, level-loops, and distillation columns are commonly encountered in the chemical process industry, and these are having a significant role in the functioning of any chemical process. For the smooth and efficient functioning of any such process, a robust control law design is an important work to be considered. In this paper, a modified 2DOF robust PID control law has been developed to ensure satisfactory performance in both the step and ramp type references and disturbances. Controller parameters are derived with Maximum sensitivity, Gain, and Phase margin specifications. Case studies with different chemical processes like CSTR, distillation column, heat exchangers, and boiler drum level-loop are included for both the nominal and perturbed cases. Lastly, a performance comparison of ISE (Integral of square error), ITAE (Integral time absolute error), IAE (Integral absolute error), and Total variation (TV) of the control signal is also included.

Date: 2023
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DOI: 10.1080/00207721.2023.2177903

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