Survey on Diverse Applications used for Disturbance Rejection Control Techniques

This study illustrates a review on various design method for disturbance rejection in control applications, in presence of external disturbances a state observer of optimal control is used. ESO (Extended State Observer) approximates the unknown states and with the help of it decreases the disturbance from the system to converge the system to be stable. The observer introduces reliability in the controller gain and dismisses the effect of external disturbance. The performance analysis was done here for industrial control system as well as laboratory systems too. One controller is proposed here to absorb the active disturbance for a higher order nonlinear system. From the nonlinear systems absorbing disturbance is very complex. If proper modeling of controller is not done then the system model may be not stable. The unknown states of the systems were identified and the disturbance was rejected. The stability of a high nonlinear system may be very difficult task, but this ESO has a higher impact on the stability of the system.