An Innovative Mixed-time Resolution Tool for Integrated Discrete Event, Continuous Event and Hybrid System Simulations: The Modeling and Simulation St

Use of High-Level Petri Nets for developing executable architectures, and simulations thereof, has become increasingly accepted for several reasons: they are based upon formal mathematics providing proven methods for verification; they are relatively easy to learn and use; they can be used to describe asynchronous concurrent systems; they are supported by tools that simplify the process of composing and executing them. However, Petri Nets, as originally formulated, did not include the concept of time. Since, several extensions of Petri Net methodology have developed to address timing, though none meets all of the requirements for describing complex military and commercial architectures. The proposed investigation will identify a comprehensive methodology for describing timing and provide a strategy for implementing it in an executable architecture tool. Architectures that integrate communications and operations are difficult to describe and execute because these components evolve on significantly different time scales; therefore, a mixed-time resolution strategy is required. Many systems and operations cannot be described well by the current generation of tools. This effort proposes a new integrated software toolset: Modeling and Simulation Studio will have the capability of integrating discrete event simulation, continuous event simulations and hybrid simulations of executable architecture in one Petri Net tool.