Types of simulated systems
Rand Model Designer can be used to create
models of multi-component, continuous, discrete and
hybrid (continuous-discrete) systems.
The continuous behavior of systems is described by first- and second-order differential-algebraic equations (DAE), written in scalar or matrix forms. A system may be written by the user in “free form”, including equations unresolved with respect to derivatives; Rand Model Designer will automatically detect the underlying mathematical structure.
Behavior charts (B-Charts), which are an extension of UML state chart diagrams without orthogonal states, are used for the description of discrete and hybrid behavior. For Discrete actions of B-Charts (entry, exit, transition) a very simple algorithmic language with well-known basic construction is used.
A system of equations, in free form, is used, for the description of continuous behavior. The free form for planning equations supposes the following possibilities:
use of unordered formulas;
use of differential equations, unresolved with respect to derivatives.
Typical applications for Rand Model Designer:modeling of mechanical systems;
modeling of electric circuits;
modeling of liquid hydraulic systems;
modeling of gas systems;
modeling of control systems;
modeling of macroeconomics.