Modelica Presentation

7/29/2019 Modelica Presentation

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o e ca pen ourceModeling & Simulation

Language

Ali BOYALI (PhD)

Mechanical Engineer


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o e ca pen ourceModeling & Simulation

LanguageOutline

1- Modeling and Simulation Concepts

2- Modelica Modeling & SimulationLanguage

3- Modelica Libraries & Applications

4- Modelica Association & Conclusion


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Modeling and Simulation

The aim is to

- Manage complexity of the systems

- Simulate system behavior, assess safety, performance andoptimize system before it is constructed.

- Build virtual prototypes

- Verify system operation

- Analyze what-if scenerios


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System Description

Systems are collection ofobjects whose properties wewant to study.

There are natural and artificialsystems.

The reason of study is tounderstand interaction ofsystem parts and wholesystem behavior.


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Examples of ComplexSystems

Population Dynamics(System Dynamics,supply chainmanagement,

epidemics)

Bio-medical, Bio-mechanics

Power plants Robotics Aerospace Automotive


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Model Concept &Experiment

Model is a representative of real system. It is used for experiments.

An experiment is the process of extracting information from asystem by exciting its inputs.

Experiments can be performed on models in virtual environments

without any danger.

Problems in Experiments are;

Experiment might be too expensive

Experiment might be too dangerous

System needed for expriment might not yet exist.


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Model Concept

A model of a system isanything an experimentcan be applied to, inorder to answerquestions about thatsystem.

Mental Models

(Statement like a person is reliable)

Physical Model

A physical model that mimics the real system

Mathematical Model

A description of a system where relationships are expressed inmathematical form.


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Simulation

Simulation is an experiment performed on a model.

Imitation of some real thing, process or state affairs.

IT IS REQURED SINCE

-

Experiments are too expensive

- Variables may be inaccessible

- The time scale may not be compatible with experimenter


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Modeling & Simulation

Casual Modeling

-

is also called Block-Oriented modeling.

- It is a procedural method and requires the developer to define theorder of calculation.

Acasual Modeling

-

Declarative language just require the developer to define theproblem at a higher level and leaves the solution to simulationtool.


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Modelica Modeling andSimulation Language

Modelica is a new objectoritented modeling andsimulation language.

It is suitable for multi-domainmodeling involving but notlimeted to, mechanical,electrical, hydraulics and

control systems, processoriented applications andsystem dynamics.

Modelica is designed such thatit can be utilized in a similar

Key Benefits Are

Object Oriented

Standart Libraries

Absolutely Free

Acasual Modeling

Multible Inheritences


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Every thing is object and class in Modelica programmingLanguage.

(Real, integer, models, functions, parametrized class)


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Electrical Components


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Modelica Classes andInheritance

Simplest Modelica Model


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Modelica Classes andInheritance

Modelica Model Example


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Modelica Models


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Modelica ConnectionClass

Connection class is required in order to combine components forcomplex and multi-domain projects.


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Modelica Models

Using classes and component models belong to different engineeringdomains multi-domain complex models can be constructed easily.


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Modelica Libraries

All component models are re-usable.

Since inheritance and re-usability, componentmodels are stored in specific libraries.

Modelica standart libraries developed byModelica Association are freely available insource code and can be modified.

There are standart modelica librariesdisributed over internet.

Every 6.. 12 Months new versions are relased.


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Modelica Libraries

Standart Library

Other Libraries

- Magnetic Library for Electromagneticdevices

- Thermo-fluid library for fluid systems

- Vehicle Dynamics Library

- Neural Networks

- Waste Water

- System Dynamics

- Thermal Power Plants


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Modelica Libraries-Modelica Examples

Industry Dynamics -Forester


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World PopulationDynamics

The System Dynamicsmethodology is frequentlybeing used for thedescription of complexinteractions betweendifferent biological species.

This application area, whichforms part of the ecologicalsciences, is usually referredto as population dynamics.


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Waste Water Is used for analyzingand optimization ofwaste watertreatment process.


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Electro magneticactuator

It includes components for modelingof electromagnetic devices withlumped magnetic networks.

Those models are suited for bothrough design of the magneticsubsystem of a device as well as forefficient dynamic simulation atsystem level together withneighboring subsystems

ENNA GmbH


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Building heatingsystem


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Modelica Libraries-Modelica Examples Household Refrigerator

Compressor

Tube & Wire

Condensor


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Power Consumption

Vapour Quality


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ommerc a ree


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ommerc a reeModelica Simulation

Environments Dynasim, from Dynasim AB, Sweeden (is a part of Dassault Systemsince 2006)

MathModelica, From MathCore, Sweeden

SimulationX, from ITI GmbH, Germany

MapleSIM from Canada,

MOSILAB from Germany

OpenModelica from Linkping

University, Sweeden

SCICOS from INRIA, France


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Modelica Simulations


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Flexible Body


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Modelica Assosiation

Modelica is a free language and is developed by the non-profitModelica Association since 1996.

- 2000: First Applications

- 2005: Modelica 2.2 was released.

- 2007: Modelica 3.0 was released (Actual release)

Develops also the largest, free library for multi-domain models.(Modelica Standart Libraries)

80 indivuduala and 11 organizational members.

All infos can be found under www.modelica.org

(Specifications, simulation environments, free libraries, 300papers)
http://www.modelica.org/http://www.modelica.org/http://www.modelica.org/


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Questions

Thank you for your attention.

QUESTIONS?

Documents

Modelica Presentation