Why is my supervisor empty? Finding causes for the unreachability of states in synthesized supervisors

L. Swartjes, M.A. Reniers, D. A. Van Beek, W. J. Fokkink

Research output: Chapter in Book / Report / Conference proceedingConference contributionAcademicpeer-review

Abstract

Although supervisory control synthesis has been around for many years, adoption is still low. A weak point of synthesis is the absence of a reporting mechanism. When an empty or unexpected supervisor is returned, it is very difficult to explain why this is the case. It is desired to return an explanation for a question, like, Why is my supervisor empty?. In general, the information needed to provide such an explanation is not present in the synthesized result. In this paper, causes (explanations) are generated for questions regarding the absence of behavior in the synthesized system. To this end, it is first investigated what information is needed and how it should be stored. Based on these findings, information of the influence of each requirement is encoded in the supervisor. This is done by annotating colors. The resulting so-called colored predicates can be used after synthesis to derive a cause for a given question.

Original languageEnglish
Title of host publication13th International Workshop on Discrete Event Systems, WODES 2016, Xi'an, China, May 30 - June 1, 2016
PublisherInstitute of Electrical and Electronics Engineers, Inc.
Pages14-21
Number of pages8
ISBN (Electronic)9781509041909
DOIs
Publication statusPublished - 22 Jun 2016
Event13th International Workshop on Discrete Event Systems, WODES 2016 - Xi'an, China
Duration: 30 May 20161 Jun 2016

Conference

Conference13th International Workshop on Discrete Event Systems, WODES 2016
CountryChina
CityXi'an
Period30/05/161/06/16

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