Representation of Dynamic Structure Discrete Event models: A systems theory approach

The Parallel Dynamic Structure Discrete Event System Specification (DSDE) can represent systems with a time-varying structure. Changes in structure are broadly defined and include changes in models, components and their interactions. We show that the DSDE is closed under the composition operation. This property allows the construction of hierarchical and modular models. The abstract simulators necessary to execute dynamic structure models are presented. These simulators allow a description of models independently of the actual simulation procedure. The DSDE formalism handles simultaneous events in parallel, and it determines, without ambiguity, the network composition when structural changes occur.