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Open-Source Implementations of the Reactive Asset Administration Shell: A Survey.

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Summary

Open-source Asset Administration Shell (AAS) implementations are vital for Industry 4.0 Digital Twins. This study compares four AAS tools, finding they offer basic features but lack full specification compliance, highlighting interoperability challenges.

Keywords:
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Area of Science:

  • Computer Science
  • Software Engineering
  • Industrial Informatics

Background:

  • Digitalization in manufacturing, particularly Industry 4.0, relies heavily on open-source software.
  • Digital Twins, a key component of Industry 4.0, require robust underlying software frameworks like the Asset Administration Shell (AAS).
  • The need for standardized and interoperable AAS implementations is critical for successful Digital Twin adoption.

Purpose of the Study:

  • To conduct a comprehensive comparison of free and open-source implementations of the reactive Asset Administration Shell (AAS).
  • To evaluate the support of common AAS model elements and API calls across selected open-source AAS implementations.
  • To identify challenges and areas for improvement in current AAS implementations for Digital Twin development.

Main Methods:

  • A structured literature and code repository search was performed on GitHub and Google Scholar.
  • Four prominent open-source AAS implementations were selected for in-depth analysis.
  • An objective evaluation framework and testing methodology were developed to assess feature support and API compatibility.

Main Results:

  • All evaluated open-source AAS implementations provide a foundational set of necessary features.
  • No single implementation fully adheres to all aspects of the AAS specification.
  • Significant incompatibilities exist between different AAS implementations, posing challenges for interoperability.

Conclusions:

  • This research offers the first detailed comparative analysis of open-source AAS implementations.
  • The findings underscore the difficulties in achieving complete AAS specification compliance and highlight interoperability issues.
  • The study provides valuable insights for developers and researchers working on AAS-based Digital Twins, guiding future development efforts.