scilab/scicos: modeling and simulation of hybrid...
TRANSCRIPT
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Scilab/Scicos: Modeling and Simulation of HybridSystems
G. SivakumarIndian Institute of Technology, Bombay
Mumbai 400076, [email protected]
Outline
Free/Open Source S/w (quick motivation)
Scilab/Scicos Demos
Overview of Scicos
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 2: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/2.jpg)
OSS Software List
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 3: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/3.jpg)
Scientific Method
Sharing data and results is the foundation!
Way of Genius
If I have seen further [than others] it is by standing on theshoulders of giants... Issac Newton
Results are accepted only if they can be replicated! (sharing)Open Access is a must!
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 4: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/4.jpg)
Open Access Journals
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 5: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/5.jpg)
What is open access publishing?
1 Free and unrestricted online access to the research literatureand databases
2 Users are licensed to download, print, copy, redistribute, anduse
3 Author retains copyright and the right to be acknowledged
4 Papers are deposited in a public database that allowssophisticated searches (such as PubMedCentral)
5 (Bethesda Principles, April 2003)
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 6: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/6.jpg)
Free Software
http://fsf.org.in/ Richard M. Stallman
Free software
is a matter of freedom, not cost. It is a matter of liberty, not price.The word free in free software has a similar meaning as in freespeech, free people and free country ... Think of free software assoftware which is free of encumbrances, not necessarily free of cost.Think of it as swatantra software.
Degrees of Freedom
1 The freedom to run the program, for any purpose
2 The freedom to study how the program works, and adapt it to yourneeds
3 The freedom to redistribute copies so you can help your neighbor
4 The freedom to improve the program, and release yourimprovements to the public so that the whole community benefits
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 7: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/7.jpg)
Free Software
http://fsf.org.in/ Richard M. Stallman
Free software
is a matter of freedom, not cost. It is a matter of liberty, not price.The word free in free software has a similar meaning as in freespeech, free people and free country ... Think of free software assoftware which is free of encumbrances, not necessarily free of cost.Think of it as swatantra software.
Degrees of Freedom
1 The freedom to run the program, for any purpose
2 The freedom to study how the program works, and adapt it to yourneeds
3 The freedom to redistribute copies so you can help your neighbor
4 The freedom to improve the program, and release yourimprovements to the public so that the whole community benefits
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 8: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/8.jpg)
Free Software
http://fsf.org.in/ Richard M. Stallman
Free software
is a matter of freedom, not cost. It is a matter of liberty, not price.The word free in free software has a similar meaning as in freespeech, free people and free country ... Think of free software assoftware which is free of encumbrances, not necessarily free of cost.Think of it as swatantra software.
Degrees of Freedom
1 The freedom to run the program, for any purpose
2 The freedom to study how the program works, and adapt it to yourneeds
3 The freedom to redistribute copies so you can help your neighbor
4 The freedom to improve the program, and release yourimprovements to the public so that the whole community benefits
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 9: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/9.jpg)
Free Software
http://fsf.org.in/ Richard M. Stallman
Free software
is a matter of freedom, not cost. It is a matter of liberty, not price.The word free in free software has a similar meaning as in freespeech, free people and free country ... Think of free software assoftware which is free of encumbrances, not necessarily free of cost.Think of it as swatantra software.
Degrees of Freedom
1 The freedom to run the program, for any purpose
2 The freedom to study how the program works, and adapt it to yourneeds
3 The freedom to redistribute copies so you can help your neighbor
4 The freedom to improve the program, and release yourimprovements to the public so that the whole community benefits
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 10: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/10.jpg)
Open Source Definition
From http://www.opensource.org (Author: Bruce Perens)
1 Free Redistribution
2 Source Code
3 Derived Works
4 Integrity of The Author
5 No Discrimination Against Persons or Groups
6 Distribution of License
7 License Must Not Be Specific to a Product
8 License Must Not Restrict Other Software
9 License Must Be Technology-Neutral
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 11: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/11.jpg)
Open Source Definition
From http://www.opensource.org (Author: Bruce Perens)
1 Free Redistribution
2 Source Code
3 Derived Works
4 Integrity of The Author
5 No Discrimination Against Persons or Groups
6 Distribution of License
7 License Must Not Be Specific to a Product
8 License Must Not Restrict Other Software
9 License Must Be Technology-Neutral
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 12: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/12.jpg)
Open Source Definition
From http://www.opensource.org (Author: Bruce Perens)
1 Free Redistribution
2 Source Code
3 Derived Works
4 Integrity of The Author
5 No Discrimination Against Persons or Groups
6 Distribution of License
7 License Must Not Be Specific to a Product
8 License Must Not Restrict Other Software
9 License Must Be Technology-Neutral
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 13: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/13.jpg)
Open Source Definition
From http://www.opensource.org (Author: Bruce Perens)
1 Free Redistribution
2 Source Code
3 Derived Works
4 Integrity of The Author
5 No Discrimination Against Persons or Groups
6 Distribution of License
7 License Must Not Be Specific to a Product
8 License Must Not Restrict Other Software
9 License Must Be Technology-Neutral
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 14: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/14.jpg)
Open Source Definition
From http://www.opensource.org (Author: Bruce Perens)
1 Free Redistribution
2 Source Code
3 Derived Works
4 Integrity of The Author
5 No Discrimination Against Persons or Groups
6 Distribution of License
7 License Must Not Be Specific to a Product
8 License Must Not Restrict Other Software
9 License Must Be Technology-Neutral
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 15: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/15.jpg)
Open Source Definition
From http://www.opensource.org (Author: Bruce Perens)
1 Free Redistribution
2 Source Code
3 Derived Works
4 Integrity of The Author
5 No Discrimination Against Persons or Groups
6 Distribution of License
7 License Must Not Be Specific to a Product
8 License Must Not Restrict Other Software
9 License Must Be Technology-Neutral
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 16: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/16.jpg)
Open Source Definition
From http://www.opensource.org (Author: Bruce Perens)
1 Free Redistribution
2 Source Code
3 Derived Works
4 Integrity of The Author
5 No Discrimination Against Persons or Groups
6 Distribution of License
7 License Must Not Be Specific to a Product
8 License Must Not Restrict Other Software
9 License Must Be Technology-Neutral
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 17: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/17.jpg)
Open Source Definition
From http://www.opensource.org (Author: Bruce Perens)
1 Free Redistribution
2 Source Code
3 Derived Works
4 Integrity of The Author
5 No Discrimination Against Persons or Groups
6 Distribution of License
7 License Must Not Be Specific to a Product
8 License Must Not Restrict Other Software
9 License Must Be Technology-Neutral
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 18: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/18.jpg)
Open Source Definition
From http://www.opensource.org (Author: Bruce Perens)
1 Free Redistribution
2 Source Code
3 Derived Works
4 Integrity of The Author
5 No Discrimination Against Persons or Groups
6 Distribution of License
7 License Must Not Be Specific to a Product
8 License Must Not Restrict Other Software
9 License Must Be Technology-Neutral
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 19: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/19.jpg)
Freeduc in Schools
What does it cost to produce?
How to distribute? (Postman: once in 3 months!)
What expertise does it need?
What innovation is needed for India?
Localization!
Relevant content.
Who can/will do this innovation?Compare with proprietary software!
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 20: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/20.jpg)
SciLab vs Matlab
2-D and 3-D graphics, animation www.scilab.org
Linear algebra, sparse matrices
Polynomials and rational functions
Simulation: ODE solver (ODEPACK) and DAE solver (DASSL)
Scicos: a dynamic systems modeler and simulator
Classic and robust control, LMI optimization
Differentiable and non-differentiable optimization
Signal processing
Metanet: graphs and networks
Parallel Scilab using PVM
Statistics
Interface with Computer Algebra (Maple, MuPAD)
Which is better for student?
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 21: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/21.jpg)
Other Educational Sector Examples
Linux Cluster (16 node) at IIT-Bombay
Most Value for money!Molecular modellingCircuit SimulationAerodynamics
Online Course Management
dotLRNMoodle
Not just for Science and Engineering
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 22: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/22.jpg)
FOSS for India
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 23: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/23.jpg)
Cost of FOSS
There is no Free Lunch! What is the tradeoff?Skilled Human Resources versus Money!Which one does India have in abundance?Which one should we bet on?
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 24: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/24.jpg)
Scilab (www.scilab.org)
Developed at INRIA (since 1990).
Powerful environment for scientfic and engineeringapplications
Freely distributed in source code format.
Scilab’s distinct parts
An interpreter
Libraries of functions (Scilab procedures)
Libraries of Fortran and C routines.
Powerful matrix operations
Open programming environment for creation of functions andlibraries by user
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 25: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/25.jpg)
SciLab Demo
We’ll see Scilab’s built-in Demos
Polynomials
Matrices
Plotting
Graphics (plot2d, plot3d, param3d, hist3d)
All source available (we’ll inspect some of them)
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 26: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/26.jpg)
Scicos (www.scicos.org)
Scicos is a Scilab toolbox with
A user-friendly GUI based editor for modeling hybriddynamical systems
Hierarchical block diagram structure
A large number of standard blocks available in various palettes
Possibility of defining new blocks using C, Fortran (dynamiclink) or Scilab Language
Diagram compilation and fast simulation
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
![Page 27: Scilab/Scicos: Modeling and Simulation of Hybrid Systemsftp.feq.ufu.br/Luis_Claudio/EQ125/Híbrido_Scilab/siva... · 2007-10-11 · Scilab/Scicos: Modeling and Simulation of Hybrid](https://reader034.vdocuments.us/reader034/viewer/2022042104/5e8162344b78e964e24a0c09/html5/thumbnails/27.jpg)
Simple Scicos Demo
Let us build the following example
and learn the basics.
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
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Events/Clocks in Scicos
From the Scicos Presentation let us look at
Activation Links
MultiFrequency Activation
SubSampling (if-then-else)
Event Driven Activation (Inheritance)
Continuous Time
Continuous Time Events (Zero-crossing)
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems
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Constructing your own Blocks
Pulse Generator Example from Scicos Presentation
G. Sivakumar Indian Institute of Technology, Bombay Mumbai 400076, India [email protected]
Scilab/Scicos: Modeling and Simulation of Hybrid Systems