Fractional control of a nonlinear process

In recent years fractional calculus has been attracting the attention of scientists and engineers, resulting in the development of many applications, especially in control engineering. This paper deals with the design and implementation of fractional order proportional integral (FO-PI) controller for Two Interacting Tank Level (TITL) process. The FO-PI controller and integer order proportional integral (IO-PI) has been designed for integer order system (IOS) using Fractional M_S constrained integral gain optimization (F-MIGO) and Approximated M_S constrained integral gain optimization (A-MIGO) tuning rule respectively. The performance of IOS with FO-PI controller and IOS with IO-PI controller has been compared based on Integral Square Error Criteria (ISE).