A comparative study on control techniques of non-square matrix distillation column

The non-square matrix control is very much important in process industry as most of the plant transfer functions are non-square in nature. The controlling is challenging due to the complexity involved while solving for its performance and robustness. The distillation column transfer function with right half plane zeros is considered here for the comparative study in control techniques. The pseudo inverse of the steady state gain matrix is used here to solve the coupling problem of non-square process. Only few control techniques like Davison - Tanttu and Lieslethto method to control more manipulated and less number of control variables. The Integral Square Error (ISE) performance is calculated to compare the controller design methods, since the error is small and exist for long time. Also settling time, overshoot, interaction and robustness are studied.