DESIGN OF CONTROLLERS FOR SEXTUPLE TANK PROCESS

Abstract

This work focuses on the development of controllers for the six spherical tank interacting process. The presence
of interaction between the tanks and the dead time makes the control of sextuple tank process more interesting
and challenging and it is ideally suited to demonstrate a multivariable level control problem. Also Control of
liquid level in a spherical tank is important because the process is highly nonlinear due to the variation in the
area of cross section of the system with height. In this paper decentralized PI, optimal PI and Fractional order
Proportional Integral (FO-PI) controllers are designed to control the level of the sextuple tank process. The
simulation results show that FO-PI controller gives better performance comparatively.