Abstract
Background/Objectives: An adaptive Proportional Integral (PI) controller for a conical tank liquid level process is simulated in MATLAB platform. Method/Statistical Analysis: The Scheduled PI and Internal model control (IMC) based PI performance are compared in terms of settling time rise time, overshoot, Integral of Squared Error (ISE), Integral of Absolute Error (IAE), Integral Time Absolute Error (ITAE) and disturbance rejection. For IMC based PI tuning, the exact model of the process obtained by on line estimation of process gain and time constant. Findings: The IMC based tuning procedure ensures good performance by Proportional and Integral (PI) controller. The Ziegler Nichols (ZN) tuning rules and estimation based tuning are used for scheduled Proportional and Integral (PI) and internal model control based PI controller. Applications/Improvements: Derivative controller can be added to this PI controller for distillation process. Keywords: Disturbance Rejection, IMC based PI, Integral of Square Error, Scheduled PI
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