Supremal realizability of behaviors with uncontrollable exogenous events

  • Authors:
  • Nitin Yadav;Paolo Felli;Giuseppe De Giacomo;Sebastian Sardina

  • Affiliations:
  • RMIT University, Melbourne, Australia;Sapienza Univ. di Roma, Roma, Italy;Sapienza Univ. di Roma, Roma, Italy;RMIT University, Melbourne, Australia

  • Venue:
  • IJCAI'13 Proceedings of the Twenty-Third international joint conference on Artificial Intelligence
  • Year:
  • 2013

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Abstract

The behavior composition problem involves the automatic synthesis of a controller able to "realize" (i.e., implement) a desired target behavior specification by suitably coordinating a set of already available behaviors. While the problem has been thoroughly studied, one open issue has resisted a principled solution: if the target specification is not fully realizable, is there a way to realize it "at best"? In this paper we answer positively, by showing that there exists a unique supremal realizable target behavior satisfying the specification. More importantly we give an effective procedure to compute such a target. Then, we introduce exogenous events, and show that the supremal can again be computed, though this time, into two variants, depending on the ability to observe such events.