The real-time supervisory control of an experimental manufacturing system based on a hybrid method


UZAM M. , Gelen G.

CONTROL ENGINEERING PRACTICE, vol.17, no.10, pp.1174-1189, 2009 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 17 Issue: 10
  • Publication Date: 2009
  • Doi Number: 10.1016/j.conengprac.2009.05.004
  • Title of Journal : CONTROL ENGINEERING PRACTICE
  • Page Numbers: pp.1174-1189
  • Keywords: Automata, Petri nets, Supervisory control theory, PLC, Real-time implementation, Ladder logic diagram

Abstract

In this paper, the real-time supervisory control of an experimental manufacturing system is reported based on a recently proposed hybrid (mixed PN/automaton) approach. Assuming that an uncontrolled bounded Petri net (PN) model of a (plant) discrete event system (DES) and a set of forbidden state specifications are given, the proposed approach computes a maximally permissive and nonblocking closed-loop hybrid model. The method is straightforward logically, graphically and technologically. This paper particularly shows the applicability of a hybrid (mixed PN/automaton) approach to low-level real-time DES control. To do this, programmable logic controller (PLC) based real-time control of an experimental manufacturing system is considered. (C) 2009 Elsevier Ltd. All rights reserved.