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Safety requirement verification of train-centric CBTC by integrating STPA with coloured Petri net

Author

Listed:
  • Qian Xu
  • Jun-ting Lin

Abstract

Train-centric communication-based train control (TcCBTC) system is characterised by core functions centralised into on-board facilities with simplified trackside equipment. Coloured Petri net (CPN) is one of the classical model checking methods and system-theoretic process analysis (STPA) is a relatively new hazard identification method based on system thinking and control theory. STPA and CPN are mutually complementary because STPA provides the verification basis for CPN while CPN makes STPA's results written by natural language verifiable. The functional requirements of TcCBTC are analysed first. Secondly, via the assistant analysis tool XSTAMPP 2.0, the hierarchical control structure is built and the refined unsafe control actions are obtained to generate the safety requirements. Thirdly, CPN models are constructed for verifying the basic properties and the safety. Results show that the potential unsafe control paths can be identified by the proposed method on the system level and the dependence severity on the manual analysis is considerably reduced.

Suggested Citation

  • Qian Xu & Jun-ting Lin, 2023. "Safety requirement verification of train-centric CBTC by integrating STPA with coloured Petri net," International Journal of Industrial and Systems Engineering, Inderscience Enterprises Ltd, vol. 43(2), pages 168-189.
    • Handle: RePEc:ids:ijisen:v:43:y:2023:i:2:p:168-189
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