Towards Digital Twin-enabled DevOps for CPS providing Architecture-Based Service Adaptation & Verification at Runtime

Background: Industrial Product-Service Systems (IPSS) denote a service-oriented way of providing access to cyber-physical systems' (CPS) capabilities. The design of such systems bears high risk due to uncertainty in requirements related to service function and behavior, operation environments,...

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Vydáno v:2022 International Symposium on Software Engineering for Adaptive and Self-Managing Systems (SEAMS) s. 132 - 143
Hlavní autoři: Dobaj, Jurgen, Riel, Andreas, Krug, Thomas, Seidl, Matthias, Macher, Georg, Egretzberger, Markus
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: ACM 01.05.2022
Témata:
Adaptation models
Adaptive systems
Computational modeling
CPS
Deployment
DevOps
Digital Twin
Digital twins
IPSS
Runtime
Self-Adaptation
Systems architecture
Uncertainty
ISSN:2157-2321
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Popis
Shrnutí:Background: Industrial Product-Service Systems (IPSS) denote a service-oriented way of providing access to cyber-physical systems' (CPS) capabilities. The design of such systems bears high risk due to uncertainty in requirements related to service function and behavior, operation environments, and evolving customer needs. Such risks and uncertainties are well known in the IT sector, where DevOps principles ensure continuous system improvement through reliable and frequent delivery processes. A modular and service-oriented system architecture complements these processes to facilitate IT system adaptation and evolution.Objective: This work proposes a method to use and extend the Digital Twins (DTs) of IPSS assets for enabling the continuous optimization of CPS service delivery and the latter's adaptation to changing needs and environments. This reduces uncertainty during design and operations by assuring IPSS integrity and availability, especially for design and service adaptations at CPS runtime.Methodology: The method builds on transferring IT DevOps principles to DT-enabled CPS IPSS. The chosen design approach integrates, reuses, and aligns the DT processing and communication resources with DevOps requirements derived from literature.Results: We use these requirements to propose a DT-enabled self-adaptive CPS model, which guides the realization of DT-enabled DevOps in CPS IPSS. We further propose detailed design models for operation-critical DTs that integrate CPS closed-loop control and architecture-based CPS adaptation. This integrated approach enables the implementation of A/B testing as a use case and central concept to enable CPS IPSS service adaptation and reconfiguration.Conclusion: The self-adaptive CPS model and DT design concept have been validated in an evaluation environment for operation-critical CPS IPSS. The demonstrator achieved sub-millisecond cycle times during service A/B testing at runtime without causing CPS operation interferences and downtime.CCS CONCEPTS* Computer systems organization~Embedded and cyber-physical systems *Computer systems organization~Architectures
ISSN:2157-2321
DOI:10.1145/3524844.3528057