Table of Contents
Advances in Power Electronics
Volume 2014 (2014), Article ID 507142, 5 pages
http://dx.doi.org/10.1155/2014/507142
Research Article

Adaptive PID Controller Using RLS for SISO Stable and Unstable Systems

1Automatic Control Engineering, Egyptian Nuclear and Radiological Regulatory Authority (ENRRA), 3 Ahmed El-Zomor Street, El-Zohor District, Naser City, Cairo 11762, Egypt
2Automatic Control Engineering, Department of Electronics and Communication, Faculty of Engineering, Cairo University, Giza 12316, Egypt
3Nuclear Engineering, Egyptian Nuclear and Radiological Regulatory Authority (ENRRA), 3 Ahmed El-Zomor Street, El-Zohor District, Naser City, Cairo 11762, Egypt

Received 28 June 2014; Accepted 23 September 2014; Published 7 October 2014

Academic Editor: Francesco Profumo

Copyright © 2014 Rania A. Fahmy et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The proportional-integral-derivative (PID) is still the most common controller and stabilizer used in industry due to its simplicity and ease of implementation. In most of the real applications, the controlled system has parameters which slowly vary or are uncertain. Thus, PID gains must be adapted to cope with such changes. In this paper, adaptive PID (APID) controller is proposed using the recursive least square (RLS) algorithm. RLS algorithm is used to update the PID gains in real time (as system operates) to force the actual system to behave like a desired reference model. Computer simulations are given to demonstrate the effectiveness of the proposed APID controller on SISO stable and unstable systems considering the presence of changes in the systems parameters.