Plausible Petri nets as self-adaptive expert systems: a tool for infrastructure asset monitoring

Manuel Chiachío, Juan Chiachío, Darren Prescott, John Andrews

Research output: Contribution to journalArticle

Abstract

This article provides a computational framework to model self-adaptive expert systems using the Petri net (PN) formalism. Self-adaptive expert systems are understood here as expert systems with the ability to autonomously learn from external inputs, like monitoring data. To this end, the Bayesian learning principles are investigated and also combined with the Plausible PNs (PPNs) methodology. PPNs are a variant within the PN paradigm, which are efficient to jointly consider the dynamics of discrete events, like maintenance actions, together with multiple sources of uncertain information about a state variable. The manuscript shows the mathematical conditions and computational procedure where the Bayesian updating becomes a particular case of a more general basic operation within the PPN execution semantics, which enables the uncertain knowledge being updated from monitoring data. The approach is general, but here it is demonstrated in a novel computational model acting as expert system for railway track inspection management taken as a case study using published data from a laboratory simulation of train loading on ballast. The results reveal self-adaptability and uncertainty management as key enabling aspects to optimize inspection actions in railway track, only being adaptively and autonomously triggered based on the actual learnt state of track and other contextual issues, like resource availability, as opposed to scheduled periodic maintenance activities.

LanguageEnglish
Pages1-18
Number of pages18
JournalComputer-Aided Civil and Infrastructure Engineering
DOIs
Publication statusPublished - 12 Dec 2018

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Petri nets
Expert systems
Monitoring
Inspection
Semantics
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Keywords

  • Petri nets
  • expert systems
  • Bayesian

Cite this

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Plausible Petri nets as self-adaptive expert systems : a tool for infrastructure asset monitoring. / Chiachío, Manuel; Chiachío, Juan; Prescott, Darren; Andrews, John.

In: Computer-Aided Civil and Infrastructure Engineering, 12.12.2018, p. 1-18.

Research output: Contribution to journalArticle

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