Simplified Discrete Binary PSO tuned Multivariable PID Controller for Binary Distillation Column plant

In this paper a Multivariable PID Controller is designed for a Binary Distillation column plant. The Binary Distillation Column is mainly used for the separation of liquid mixtures containing volatile and non-volatile components. To maintain the mole fraction of the distillate the PID Controller regulates the vapour flow rate and liquid flow rate. Decoupler is used to avoid loop interactions as it may cause instability. The PID controller is tuned using the Particle Swarm Optimization (PSO) algorithm and the Discrete Binary Particle Swarm Optimization (DBPSO) algorithm and Simplified Discrete Binary Particle Swarm Optimization (SDBPSO) algorithm to obtain reduced settling time. Simulations are carried out to minimize Integral of Absolute Error (IAE). Transient response analysis shows the better performance of SDBPSO algorithm over PSO and DBPSO algorithm. Stability analysis is done using pole-zero map and Nyquist plot.