A comparative study on the well-known feedback controller design methods

In this paper, the well-known feedback controller design methods schemes such as Direct Synthesis (DS) method and PID design methods are compared. PID controllers are derived from Direct Synthesis (DS) controller by approximating the dead-time for FOPDT process models. In this work, DS and dead-time approximated PID controllers have been designed with various values of desirable closed loop time constants. A comparative study has been performed for closed loop performance/robustness for the original and the dead time approximated controllers.