Formal Verification of Dynamic Properties in an Aerospace Application
Formal Methods in System Design
Performance re-engineering of embedded real-time systems
Proceedings of the ACM SIGPLAN 1999 workshop on Languages, compilers, and tools for embedded systems
Symbolic Model Checking for Rectangular Hybrid Systems
TACAS '00 Proceedings of the 6th International Conference on Tools and Algorithms for Construction and Analysis of Systems: Held as Part of the European Joint Conferences on the Theory and Practice of Software, ETAPS 2000
Time-Deterministic Hybrid Transition Systems
Hybrid Systems V
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We give an exposition to an ongoing research effort in cooperation with aerospace industries in Sweden. We report on an application of formal verification techniques on a landing gear system. This system consists of actuating hydromechanic and electromechanic hardware, and of controlling software components. We emphasize the need for modelling techniques and languages covering the whole spectrum from informal engineering documents, to hybrid mathematical models. In this modelling process we give as much weight to the physical environment as to the controlling software. We show the application of two verification methods for proving safety and timeliness properties of the closed loop system; first, using the proof system of extended duration calculus, and second by symbolic model checking.