Comparison between optimally-tuned PID with self-tuning PID for steam temperature regulation

Performance of conventional PID controller was compared against the self-tuning PID with pole-placement method for steam temperature regulation. The comparisons were done by MATLAB simulation to evaluate the performance of the controllers in terms of set point regulation, response towards set point changes and disturbance rejection. The PID was optimally-tuned using GA with model reference input that will specify the desired closed-loop trajectory during controller optimization. The self-tuning PID control on the other hand was synthesized using pole-placement with type-A PID structure. Generally, both controllers´ gave satisfactory response in every aspect but the IAE index shows that the self-tuning PID was superior.