Modeling Simulink Diagrams Using Input/Output Extended Finite Automata

We develop a modeling approach for Simulink diagrams. Simulink is a commercial graphical representation tool for representing and simulating dynamical systems. We propose a recursive approach for modeling a class of Simulink diagrams as input/output-extended finite automata (I/O-EFA). A model of a Simulink diagram can be used for further analysis such as test generation and formal verification. The modeling approach is sound and complete: The input-output behavior of an I/O-EFA model, as defined in terms of a step-trajectory, preserves the input-output behavior of the corresponding Simulink diagram at each sample time.