Decentralized fault prognosis of discrete event systems with guaranteed performance bound. (July 2016)

• Record Type: Journal Article
• Authors: Yin, Xiang; Li, Zhaojian
• Is Part Of: Automatica. Volume 69(2016)
• Page Start: 375
• Page End: 379
• Publication Date: 2016-07
• Subjects: Discrete-event systems -- Fault prognosis -- Decentralized architectures; Automatic control -- Periodicals; Automation -- Periodicals; 629.805
• DOI: 10.1016/j.automatica.2016.03.015
• Languages: English
• ISSNs: 0005-1098

Abstract

Abstract: We study the problem of decentralized fault prognosis of partially-observed discrete event systems. In order to capture the prognostic performance issue in the prognosis problem, we propose two new criteria: (1) all faults can be predicted K steps ahead; and (2) a fault will occur for sure within M steps once a fault alarm is issued; and we refer to ( M, K ) as the performance bound of the prognostic system. A necessary and sufficient condition for the existence of a decentralized supervisor satisfying these two criteria is provided, which is termed as ( M, K ) -coprognosability. A polynomial-time algorithm for the verification of ( M, K ) -coprognosability is also proposed. Finally, we show that the proposed approach is applicable to both disjunctive and conjunctive architectures. Our results generalize previous work on decentralized fault prognosis.