Title : Experimental studies on control of a two tank non-interacting liquid level System using internal model based pid controller
Abstract:
The flow and level control system play very important role in a Chemical Industry to achieve important objectives. The higher order processes tend to show unstable behavior and an advanced control system is required for such processes to meet set point tracking and disturbance rejection. In the present work, it is proposed to design an advanced control system such as Internal model control based PID control for two tank non- interacting liquid level process. Real-time step test has been conducted for identification of the two tank non interacting liquid level process. The process has been identified as the first-order with dead time transfer function model. Based on above transfer function model, the IMC-PID controller has been designed. Experimental study shows that the IMC-based PID Controller results in superior performance with lesser overshoot and lesser settling time than conventional PID controller in case of set point tracking. Tuning factor (λ) for IMC-PID is selected as 0.5 for best performance. Actual parameters of IMC-PID are selected as 40% of designed parameters by a trial and error method.
