Abstract
Duration Calculus is a real-time interval logic which can be used to specify and reason about timing and logical constraints on discrete states in a dynamic system. It has been used to specify and verify designs for a number of real-time systems. This paper extends the Duration Calculus with notations to capture properties of piecewise continuous states. This is useful for reasoning about hybrid systems with a mixture of continuous and discrete states. The proof theory of Duration Calculus is extended such that results proven using mathematical analysis can be used freely in the logic. This provides a flexible interface to conventional control theory.Keywordsrequirementssoftware designhybrid systemsreal-time systemscontrol theoryinterval logicdurations
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