Implementation of fuzzy logic control for FOPDT model of distillation column

Distillation column is an integral process component where better control means minor compromise in the quality leading to lower energy consumption, which is difficult to achieve in a non linear MIMO system. The traditional PID technique finds difficulty in achieving the setpoint for this nonlinear system with substantial time delays. The objective of this paper is to present a more robust approach of fuzzy logic control for such complex systems, where FLC is designed and then combined with PID using MATLAB and the system responses are compared in the simulation environment. This control algorithm delivers a stable transient and dynamic response for the desired products.