Design of Performance Improved Pid Controller For First Order Unstable Process With Time Delays

Abstract

This paper proposes a performance improved PID controller for first order unstable process with time delays, which improves the both set point tracking and the load disturbance rejection. To remove the delay effect we use smith predictor (SP) control in the closed-loop and in similar to Internal Model Control (IMC) the delay part gets reduced. To stabilize the set point response, a conventional proportional controller is employed and its performance specification are derived with reference of Integral-Squared-Error (ISE). To reject the load disturbances, desire closed-loop function requires. Load disturbance rejections are improved and set point performances have both improved. Simulation results will exhibit the better exploit when compared with previous approaches.