EVALUATION OF TIME AND FREQUENCY DOMAIN DATA-DRIVEN PID TUNING APPLIED TO PILOT PLANTS
This paper presents an evaluation of a time data-driven PID tuning restricted by frequency specification for closed-loop systems in pilot plants. It uses data collected from a specific closed-loop experiment to estimate frequency response and obtain time domain points. The initial PID tuning gains are adjusted in order to match the defined reference model and frequency response specializations using a constrained optimization technique. The proposed strategy is demonstrated in two laboratory scale processes, a thermal plant based on Peltier effect and a level control-loop in a quadruple-tank system.