Abstract
This paper presents an approach to the development of safetycritical real-time systems linking from the Requirements Language developed in the ESPRIT Project ProCoS to the Temporal Language of Transitions (TLT) specification language developed at Siemens Corporate Research. A system is defined by a conventional mathematical model for a dynamic system where application specific states denote functions of time. Requirements are constraints on the system states, and they are given by formulas in duration calculus (DC), a real-time interval logic. A functional design is a distributed system consisting of sensors, actuators, and a program which communicate through shared states. The sensors and actuators are specified in DC while the program is specified in TLT. The design as a whole is linked together semantically by using a DC semantics for TLT. Verification is a deduction showing that a design implies requirements. The TLT specification is the basis for developing the control program. The method is illustrated by a steam-boiler example.
Supported by the CEC under the ESPRIT BRA Project No. 7071: ProCoS II, by the Danish Technical Research Council under the Codesign Project, and by the german BMFT project KORSYS.
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Rischel, H., Cuellar, J., Mørk, S., Ravn, A.P., Wildgruber, I. (1995). Development of safety-critical real-time systems. In: Bartosek, M., Staudek, J., Wiedermann, J. (eds) SOFSEM '95: Theory and Practice of Informatics. SOFSEM 1995. Lecture Notes in Computer Science, vol 1012. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-60609-2_11
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