Journal of Xidian University ›› 2019, Vol. 46 ›› Issue (3): 66-73.doi: 10.19665/j.issn1001-2400.2019.03.011

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Method for the verification of safety requirements of avionics systems

DING Ming1,2,ZHANG Shuling1,ZHANG Chen3,Zhang Jun2   

  1. 1. School of Information Science and Technology, Northwest University, Xi'an, 710127, China
    2. Xi'an Aeronautics Computing Technique Research Institute, AVIC, Xi'an, 710119, China
    3. School of Computer Science and Technology, Xidian University, Xi'an, 710071, China
  • Received:2019-01-06 Online:2019-06-20 Published:2019-06-19

Abstract:

To ensure the correctness of avionics systems safety assessment, a model-based system safety requirements description and verification approach is proposed. First, hazard use cases are established and safety requirements are captured according to the system functional requirements, safety objectives and failure states. Second, the state machine diagrams with functional failure are used to describe the system functional model including safety requirements. The safety extended hierarchical automata are used as the intermediate models, and the formal description of the system functional model is realized by the transformation algorithm. Finally, the correctness of safety requirements is verified by model checking. Case studies are presented to show that this method can verify whether the designed system's functions meet the safety attributes and improve the accuracy and efficiency of safety assessment.

Key words: avionics systems, safety, formal methods, model checking

CLC Number: 

  • TP311