Real time simulation framework for RT-DEVS models

  • Authors:

  • Seong Myun Cho;Tag Gon Kim

  • Affiliations:

  • Systems Modeling Simulation Lab., Department of Electrical Engineering & Computer Science, KAIST 373-1 Kusong-dong, Yusong-Ku, Taejon 305-701, Korea;Systems Modeling Simulation Lab., Department of Electrical Engineering & Computer Science, KAIST 373-1 Kusong-dong, Yusong-Ku, Taejon 305-701, Korea

  • Venue:
  • Transactions of the Society for Computer Simulation International - Recent advances in DEVS methodology--part II
  • Year:
  • 2001

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Abstract

This paper presents a real time simulation framework in which simulation models are specified by the real time DEVS (RT-DEVS) formalism. Here, real time simulation denotes the framework's ability to interact with a surrounding environment, such as software components, hardware components or human operators. Typical examples are man-in-the-loop simulations such as a flight simulation or simulation of a controller with real time constraints. In such simulations, a simulator must handle external events in a timely manner. We propose a real time, interactive simulation methodology which concurrently executes RT-DEVS models along with its environment in a time selective manner. The proposed simulation methodology employs an event-driven scheduling policy to meet timing requirements of RT-DEVS models. We developed a real time simulation kernel that supports the proposed simulation methodology. A simple example of real time, interactive simulation demonstrates effectiveness of the proposed methodology and the developed environment.