Design of feedback-feedforward controller for level control in a coupled tank system

Abstract

This work suggests the method to improve the performance of interacting coupled tank system by the combinational control of feedback and feed forward simultaneously. This control system is considered to maintain the level of the second tank at some predefined value by using feed forward and feedback combinational scheme. Though conventional proportional integral- derivative (PID) controller is most capable controller used in process industries to regulate the process variables, it has some limitations which can be overcome by using this strategy. Here, the effect of disturbance on the performance of the system is considered. According to these disturbances, we implemented a feed forward controller to compensate the disturbances with its effect on the performance of the system. Thus, the comparison between feedback and feedback feed forward implementation for the system is done using MATLAB simulink and experimentation is carried out.