Real-time systems refer to systems that have real-time requirements for interacting with a human operator or other
agents with similar timescales. An efficient simulation of real-time systems requires a model that is accurate enough to
accomplish the simulation objective and is computationally efficient. In this paper a real time modeling system for dynamic systems will be studied. Normally, Real time modeling can be classified into hardware and software systems, but this work focuses on the software techniques and systems. Finally a demonstration example for real time simulator has been simulated for complex dynamic system, namely a small nuclear fusion device (Egyptor Tokamak). The obtained results agree well with published work. Such simulator can be considered an imperative requirement for predicative control tasks.