An Adaptive PID Regulator Based on Reconfigurable Logic Cell Arrays

Abstract The paper deals with the implementation of a high performances auto-tuning PID regulator by means of the Logic Cell Arrays (LCA) devices. The auto-tuning method is based on a preliminary use of Relay control to bring the output of the closed-loop system to a permanent oscillating condition. The prototype is composed by two printed circuit boards: the first one, dedicated to the auto-tuning algorithm, is based on a Z80 microprocessor, while the second one, equipped with 7 LCAs, is charged with the control tasks, i.e. the PID and Relay actions.