Abstract: This paper shows the controller design of a non-linear system. The Non-linear system we took up for the analysing is the Two Tank Interacting Conical System. The controller design is obtained in two parts: first a decoupling matrix is designed in order to minimize the interaction effects. Later, the controller design is obtained for both process and Decoupler block. Our aim is to meet the design specifications for each loop independently. So, we are using De-Centralized PID Controller. Simulation is made to demonstrate the effectiveness of the proposed method using MATLAB software

Keywords—Multi-loop PID Controller, Relative Gain Array, Decentralized controller, Two Tank Conical Interacting System, Decoupling.

| DOI: 10.17148/IARJSET.2021.8904