CLOSED-LOOP TUNING METHOD BASED ON DOMINANT POLE PLACEMENT

Algorithms are developed based on dominant pole placement to arrive at PID controller settings which yield desired decay ratio and nearly minimum IAE and ITAE. The process is fitted to first-order plus time-delay via a closed-loop process reaction curve. Tuning rules for load changes, setpoint changes, and simultaneous changes in setpoint and load are expressed in simple-to-use correlation form. The proposed closed-loop tuning method are demonstrated to be far superior to numerous available methods in view IAE, ITAE, decay ratio, overshoot, normalized prediction horizon, and maximum log modulus.