Modelica

Modelica is an object-oriented modeling language to model multi-physics systems described by differential-, algebraic and discrete equations via hierarchical composition diagrams which are close to the schematics used in many engineering disciplines. The (free) language is developed and maintained by the Modelica Association. Examples for Modelica models:

The Modelica Association and other people have developed and are still developing free and commercial component libraries in many domains. Download the free libraries from here. They have the following content:

Free Modelica Standard Library

The following library is developed together with the Modelica language from members of the Modelica Association. Although this library is free software, there are some minor restrictions defined in the Modelica license conditions.

Modelica Standard library for the Modelica language from the Modelica Association

Blocks Basic input/output control blocks (transfer functions, nonlinear elem., ...)

Continuous Continuous control blocks with internal states (PI, PID, state space, ...)

Math Mathematical functions as input/output blocks (gain, sum, sin, cos, ...)

Nonlinear Discontinuous or non-differentiable algebraic control blocks

Sources Signal source blocks generating Real and Boolean signals

Constants Mathematical constants and constants of nature

Electrical Analog electrical models (resistor, capacitor, lines, semiconductors, ...)

Icons Icon definitions

Math Mathematical functions (sin, cos, log, ...)

Mechanics Mechanical systems

Rotational 1-dim. rotational mechanical components (inertia, clutch, brake, ...)

Translational 1-dim. translational mechanical components (mass, spring, stop, ...)

SIunits Type definitions based on SI units according to ISO 31-1992

Free Modelica Libraries

The following free libraries are supplied from different authors. Although these libraries are free software, there are some minor restrictions defined in the Modelica license conditions.

HyLibLight Library of hydraulic components from Prof. Peter Beater
(full version is commercial, see below)

ModelicaAdditions Collection of Modelica libraries of DLR from Martin Otter
(developed in EU Project RealSim under contract IST-1999-11979).

Blocks Additional input/output blocks

Discrete Discrete input/output blocks with fixed sample period

Logical Boolean input/output blocks

Multiplexer Combine and split signal connectors of type Real

HeatFlow1D 1-dimensional heat flow (heat resistance/capacitance, convection, ...)

MultiBody 3-dimensional mechanical systems (3D-bodies, joints, force elements, ...;
Dymola version 4.1 required)

PetriNets Petri nets and state transition diagrams (Paper about the method)

Tables Table look-up in 1 and 2 dimensions (data optionally from file)

ObjectStab Power Systems Voltage and Transient Simulation Library from Mats Larsson. Paper about ObjectStab.

Licensed Modelica Libraries

The following libraries are commerically sold and need a license.

HyLib Library of about 90 hydraulic components from Prof. Peter Beater, such as pumps, motors, valves, orifices, etc. (Distributor: Dynasim)

Last modified: Sept. 2000

Modelica				Standard library for the Modelica language from the Modelica Association
	Blocks			Basic input/output control blocks (transfer functions, nonlinear elem., ...)
		Continuous		Continuous control blocks with internal states (PI, PID, state space, ...)
		Math		Mathematical functions as input/output blocks (gain, sum, sin, cos, ...)
		Nonlinear		Discontinuous or non-differentiable algebraic control blocks
		Sources		Signal source blocks generating Real and Boolean signals
	Constants			Mathematical constants and constants of nature
	Electrical			Analog electrical models (resistor, capacitor, lines, semiconductors, ...)
	Icons			Icon definitions
	Math			Mathematical functions (sin, cos, log, ...)
	Mechanics			Mechanical systems
		Rotational	1-dim. rotational mechanical components (inertia, clutch, brake, ...)
		Translational	1-dim. translational mechanical components (mass, spring, stop, ...)
	SIunits		Type definitions based on SI units according to ISO 31-1992

HyLibLight			Library of hydraulic components from Prof. Peter Beater (full version is commercial, see below)
ModelicaAdditions			Collection of Modelica libraries of DLR from Martin Otter (developed in EU Project RealSim under contract IST-1999-11979).
	Blocks		Additional input/output blocks
		Discrete	Discrete input/output blocks with fixed sample period
		Logical	Boolean input/output blocks
		Multiplexer	Combine and split signal connectors of type Real
	HeatFlow1D		1-dimensional heat flow (heat resistance/capacitance, convection, ...)
	MultiBody		3-dimensional mechanical systems (3D-bodies, joints, force elements, ...; Dymola version 4.1 required)
	PetriNets		Petri nets and state transition diagrams (Paper about the method)
	Tables		Table look-up in 1 and 2 dimensions (data optionally from file)
ObjectStab			Power Systems Voltage and Transient Simulation Library from Mats Larsson. Paper about ObjectStab.