Switches and Jumps in Hybrid Action Systems
نویسنده
چکیده
Hybrid action systems extend a conventional action system with a guarded di erential equation | a di erential action | that de nes evolution of continuous variables while the guard remains true. The new action is given a weakest liberal precondition semantics, which is illustrated by examples from a train model. The example motivates a discussion of priorities in a system of iterated di erential and ordinary actions. The conclusion is a proposal for a standard form with urgency of discrete actions. The result is compared with Branicky's classi cation in \may" and \must" jumps or switches. The asynchronous \may" switches can be modelled as interrupts of evolutions.
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