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Formal Model Engineering of Distributed CPSs Using AADL: From Behavioral AADL Models to Multirate Hybrid Synchronous AADL

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Formal Aspects of Component Software (FACS 2023)

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Abstract

A promising way of integrating formal methods into industrial system design is to endow industrial modeling tools with automatic formal analyses. In this paper we identify some challenges for providing such formal methods “backends” for cyber-physical systems (CPSs), and argue that Maude could meet these challenges. We then give an overview of our research on integrating Maude analysis into the OSATE tool environment for the industrial CPS modeling standard AADL.

Since many critical distributed CPSs are “logically synchronous,” a key feature making automatic formal analysis practical is the use of synchronizers for CPSs. We identify a sublanguage of AADL to describe synchronous CPS designs. We can then use Maude to effectively verify such synchronous designs, which under certain conditions also verifies the corresponding asynchronous distributed systems, with clock skews and communication delays. We then explain how we have extended our methods to multirate systems and to CPSs with continuous behaviors.

We illustrate the effectiveness of Maude-based formal model engineering of industrial CPSs on avionics control systems and collections of drones. Finally, we identify future directions in this line of research.

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Notes

  1. 1.

    We do not have space to discuss related work in this overview paper, but our papers have extensive discussions of related work that justify our claims.

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Acknowledgments

We thank Olga Kouchnarenko and the organizers of FACS 2023 for inviting us to present this work summarizing some of our “software component-based” research to celebrate the 20th anniversary of the FACS conference. In this paper we report on research initiated by some of us and Darren Cofer and Steven Miller at Rockwell Collins and José Meseguer and Lui Sha at University of Illinois at Urbana-Champaign; we sincerely thank them all, as well as the coauthors of all the papers summarized in this paper. Bae was supported by the National Research Foundation of Korea(NRF) grants funded by the Korea government(MSIT) (No. 2021R1A5A1021944 and No. RS-2023-00251577).

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  1. Pohang University of Science and Technology, Pohang, South Korea

    Kyungmin Bae

  2. University of Oslo, Oslo, Norway

    Peter Csaba Ölveczky

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    Javier Cámara

  2. Open University of Netherlands, Heerlen, The Netherlands

    Sung-Shik Jongmans

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Bae, K., Ölveczky, P.C. (2024). Formal Model Engineering of Distributed CPSs Using AADL: From Behavioral AADL Models to Multirate Hybrid Synchronous AADL. In: Cámara, J., Jongmans, SS. (eds) Formal Aspects of Component Software. FACS 2023. Lecture Notes in Computer Science, vol 14485. Springer, Cham. https://doi.org/10.1007/978-3-031-52183-6_7

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