Formalism and semantics of PyCATSHOO: A simulator of distributed stochastic hybrid automata

Desgeorges, Loïc, Pierre-Yves Piriou, Thibault Lemattre and Hassane Chraibi

Reliability Engineering and System Safety, 2021, vol. 208, issue C

Abstract: This article lays the mathematical foundations of PyCATSHOO, a Model-Based Safety Analysis (MBSA) framework relying on distributed stochastic hybrid automata. This tool was initially developed for use cases where continuous evolution of physical variables or component failure rates matter to assess the dependability attributes. The modelling language has been designed in order to provide to the analyst the best expressiveness and ease of use. Nevertheless, although the structure and behaviour of a PyCATSHOO model have been informally described previously, they have never been formally established, which precludes its scientific acceptance and slows down its adoption by new users. To fill this lack, this article introduces formal definitions of the structure of PyCATSHOO models using set theory and of their operational semantics using inference rules (exactly 1 axiom and eight inference rules). These formal definitions are illustrated on a simple case study: the heated room. As a result, our proposing disambiguates the semantics of PyCATSHOO models, provides a formal specification of its input language and the core logic of its simulator engine and paves the way to the integration of model checking techniques in the PyCATSHOO framework.

Keywords: Stochastic hybrid automata; Formalization; Semantics; Inference rules; Model based safety analysis; Simulation (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0951832020308711
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:reensy:v:208:y:2021:i:c:s0951832020308711

DOI: 10.1016/j.ress.2020.107384

Access Statistics for this article

Reliability Engineering and System Safety is currently edited by Carlos Guedes Soares

More articles in Reliability Engineering and System Safety from Elsevier
Bibliographic data for series maintained by Catherine Liu ().