Functional analysis of a real-time protocol for networked control systems

  • Authors:
  • Colin Fidge;Yu-Chu Tian

  • Affiliations:
  • School of Software Engineering and Data Communications, Queensland University of Technology, Australia;School of Software Engineering and Data Communications, Queensland University of Technology, Australia

  • Venue:
  • ATVA'06 Proceedings of the 4th international conference on Automated Technology for Verification and Analysis
  • Year:
  • 2006

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Abstract

Traditional real-time control systems are tightly integrated into the industrial processes they govern. Now, however, there is increasing interest in networked control systems. These provide greater flexibility and cost savings by allowing real-time controllers to interact with industrial processes over existing communications networks. New data packet queuing protocols are currently being developed to enable precise real-time control over a network with variable propagation delays. We show how one such protocol was formally modelled using timed automata, and how model checking was used to reveal subtle aspects of the control system's dynamic behaviour.