Implementation of a double controller scheme for autonomous tuning in level process

The aim of this paper is to design a double controller scheme for autonomous tuning of set-point tracking response and disturbance rejection response. Thus it improve the three performance attributes of control loop include set-point tracking response, disturbance rejection response and robustness. The proposed scheme provides additional flexibility for reducing the noise due to actuator chattering. Here the model and process mismatch in a first order system with time delay has been compensated as additional load disturbance by the load controller.