BDD-Based Synthesis of Fail-Safe Supervisory Controllers for Safety-Critical Discrete Event Systems

Tianhua Xu, Haifeng Wang, Tangming Yuan, Meng Chu Zhou

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Sophisticated hardware/software and harsh environment in safety-critical discrete event systems may cause system failures that can lead to catastrophic consequences. Therefore, keeping the system in a safe mode even after the occurrence of a fault is critically important. This paper addresses the problem by first extending net condition/event systems with uncontrollable transitions that allows one to well represent controllable and uncontrollable events and cater for modeling normal and abnormal events in safety-critical systems. A binary decision diagram-based symbolic supervisor synthesis method is proposed to ensure time and space efficiency when dealing with a practical supervisory control problem. As a case study, a high-speed railway station is used to illustrate the proposed concepts and method.

Original languageEnglish (US)
Article number7458841
Pages (from-to)2385-2394
Number of pages10
JournalIEEE Transactions on Intelligent Transportation Systems
Volume17
Issue number9
DOIs
StatePublished - Sep 2016

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Mechanical Engineering
  • Computer Science Applications

Keywords

  • Fail-safe supervisor
  • binary decision diagram
  • net condition/event system
  • safety-critical discrete event system

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