Comparative analysis of different controller for a nonlinear level control process

Controlling the level in the nonlinear process is hectic because of its shape. In many industries the flow and level control plays a vital role. Controlling the level in the conical tank is a challenging process because of its nonlinearity and constantly changing of cross section with respect to height. The Model for a conical tank was identified for different operating regions which were best approximated to first order plus dead time model. For the identified model different controllers such as Direct Synthesis Proportional Integral (DSPI) and Model Predictive Control (MPC) were designed and compared.