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An Integrated Approach to Real-time Distributed Control Systems over Fieldbuses

Fulltext:


Authors:

Pau Marti , Josep M. Fuertes , Gerhard Fohler

Publication Type:

Conference/Workshop Paper

Venue:

8th IEEE Int. Conf. on Emerging Technologies & Factory Automation


Abstract

The increasing application of flexible and powerful real-time distributed control systems is presently characterizing the industrial automation field. Such systems involve three main disciplines: control systems, real time systems, and communication systems. Control systems, due their stringent timing constraints, demand real time computing technology. In addition, communication systems are needed for the data messaging between field devices. In this paper, we propose an integrated approach to the design and implementation of such systems. We will show that by a separate control design and its posterior distributed implementation, the system performance may suffer degradation. That is, when control loops are closed over communication networks, timing problems (communication induced varying delays) can appear, decreasing the control system performance, and even lead the system to instability. However, we will show that by an adequate integrated approach, that takes advantage of control theory, real time communication properties, an adequate timing analysis, and an appropriate distribution of the control functions (architectural aspects), the system performance increases dramatically.

Bibtex

@inproceedings{Marti272,
author = {Pau Marti and Josep M. Fuertes and Gerhard Fohler},
title = {An Integrated Approach to Real-time Distributed Control Systems over Fieldbuses},
month = {October},
year = {2001},
booktitle = {8th IEEE Int. Conf. on Emerging Technologies {\&} Factory Automation},
url = {http://www.es.mdu.se/publications/272-}
}