Designing of Decoupler for a 44 Distillation Column Processes with PID Controller

Abstract

This paper extend the concept of relative normalized gain array (RNGA) and an Equivalent Transfer Function (ETF) for each element in the transfer function matrix was derived for the closed-loop control system and proposes a systematic approach to designing decentralized PID control for distillation column process containing integrators and/or differentiators. The decoupler could be easily determined with each element in the First-Order-plus-Time-Delay (FOPTD) form and resulted in a stable, proper and causal decoupled matrix. The main advantage of this method is its simplicity; it reduces excessive calculation.