Abstract: In this paper we have designed PID, IMC, IMC-based PID controllers. Proportional-Integral-Derivative Controllers are mostly used in many industries because of its robustness and simplicity. Internal Model Controller is suitable for designing and tuning of many controllers. It has a single tuning filter factor. It is much easier way to tune PID using IMC Controller. The present work is carried out on first order time-delay (FOPDT) and second order time delay (SOPDT) processes. IMC-based PID Controller gives better set-point tracking. Level tank process is designed by using System Identification. The performance of IMC-based PID Controller is better than Ziegler-Nichol and IMC Controller.

Keywords: IMC, Filter factor, PID, System Identification, time-delay.