Adaptive controller implementation into PLC library

Abstract

This paper deals with the implementation of a self-tuning controller into a PLC (Programmable Logical Controller) library. The polynomial method is used, and the parameters for controller are derived using δ-model together with the pole placement approach. The recursive least-squares method and directional forgetting are used to estimate the parameters of the δ-model. The algorithm was implemented in the Tecomat PLC library, product of Teco, Inc. The laboratory tests proved that the algorithm implementation was successful. © 2004 IEEE.