Maybe you mean Simulink.
Simulink is deigned for control (cyber) systems, even though often used for  physical systems as well, but this usage is tricky.

Physical systems are governed by physical equations, not laplace transforms. That's why in the physical part of Modelica models time-based differential equations are used (not Laplaces')
Modelica is for Cyber-physical systems. In Modelica you can manage simulink-like cyber systems. Consider for instance Modelica.Blocks.Continuous.TransferFunction.