Logic in computer science: modelling and reasoning about systems
Logic in computer science: modelling and reasoning about systems
Symbolic Model Checking
Symmetry in temporal logic model checking
ACM Computing Surveys (CSUR)
Formal analysis of a triplex sensor voter in an industrial context
FMICS'11 Proceedings of the 16th international conference on Formal methods for industrial critical systems
Tool for translating simulink models into input language of a model checker
ICFEM'06 Proceedings of the 8th international conference on Formal Methods and Software Engineering
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Digital flight control systems utilize redundant hardware to meet high reliability requirements. In this study we use the SMV model checker to assess the design correctness of a sensor voter algorithm used to manage three redundant sensors. The sensor voter design is captured as a Simulink diagram. The requirements verified include normal operation, transient conditions, and fault handling. The sensor voter algorithm is a realistic example of flight critical embedded software used to manage redundant air data or inertial reference sensors. We are using it to evaluate different design methods, languages, and tools currently available for formal verification. Key issues are 1) integration of formal verification into existing development processes and tools, and 2) synthesis of the correct environment (world abstraction) needed for analysis of normal and off-normal operating conditions.