Control Strategies for FOPDT & SOPDT Processes

Dynamics of any industrial process may be depicted in a transfer function form. It represents the ratio of output to input in Laplace domain (‘s’ domain).This transfer function is generally in FOPDT or SOPDT form. Existence of the dead time is the factor which makes the controller designing very challenging. For any further behavioral analysis and controller development of process, the determination of this model is highly desired. In the present paper such models have been considered, and their control system design is performed using MATLAB. The parameters which have been taken into account for comparison of established controllers are settling time, peak overshoot, disturbance response, and gain margin.