Technical communique: Decentralized supervisory control of discrete event systems with communication delays based on conjunctive and permissive decision structures

  • Authors:
  • Seong-Jin Park;Kwang-Hyun Cho

  • Affiliations:
  • Department of Electrical and Computer Engineering, Ajou University, Suwon 443749, Korea;College of Medicine, Seoul National University, Jongno-gu, Seoul 110799, Korea and Bio-MAX Institute, Seoul National University, Gwanak-gu, Seoul 151818, Korea

  • Venue:
  • Automatica (Journal of IFAC)
  • Year:
  • 2007

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Abstract

In many practical discrete event systems (DESs), some unexpected and uncontrollable events can subsequently occur before a proper control action is actually applied to a plant due to communication delays. For such DESs, this paper investigates necessary and sufficient conditions for the existence of a nonblocking decentralized supervisor that can correctly achieve a given language specification when the decentralized supervisor is assumed to have a conjunctive and permissive decision structure. In particular, this paper presents a notion of delay-coobservability for a given language specification and shows that it is a key condition for the existence of such a decentralized supervisor.