View source for Software:Siconos

{{short description|Open source scientific software for modeling non-smooth dynamical systems}}
{{Infobox software
| name = SICONOS - SImulation and COntrol of NOnsmooth Systems
| developer = INRIA
| latest_release_version = 4.3.0
| latest_release_date = {{Start date and age|2020|05|05|df=yes}}
| operating_system = Linux, Mac, Windows
| programming language = C++, C, Python
| screenshot = siconos3 snapshot.png
| screenshot size = 250px
| logo = siconos logo.png
| logo size = 250px
| genre = [[Software framework|Framework]]
| license = [[Software:Apache License 2.0|Apache License 2.0]]
| website = {{URL|siconos.gforge.inria.fr}}
| repo = {{URL|https://github.com/siconos/siconos/releases/latest}}
}}
'''SICONOS'''  is an Open Source scientific software primarily targeted at
modeling and simulating non-smooth dynamical systems (NSDS):<ref>
{{citation
    |last1=Acary
    |first1=Vincent
    |last2=Brogliato
    |first2=Bernard
    |title=Numerical Methods for Nonsmooth Dynamical Systems
    |series=Lecture Notes in Applied and Computational Mechanics
 |year=2008
    |url=  https://www.springer.com/materials/mechanics/book/978-3-540-75391-9
    |volume=35
    |doi=10.1007/978-3-540-75392-6
|isbn=978-3-540-75391-9
 }}</ref>
* Mechanical systems ([[Rigid body]] or [[Physics:Continuum mechanics|solid]]) with [[Physics:Unilateral contact|Unilateral contact]] and Coulomb friction as we find in [[Physics:Non-smooth mechanics|Non-smooth mechanics]], [[Physics:Contact dynamics|Contact dynamics]] or [[Chemistry:Granular material|Granular material]].
* Switched Electrical Circuit such as [[Engineering:Power converter|Power converter]], [[Engineering:Rectifier|Rectifier]], [[Engineering:Phase-locked loop|Phase-locked loop]] ([[Engineering:Phase-locked loop|PLL]]) or [[Analog-to-digital converter]]
* [[Sliding mode control]] systems
Other applications are found in Systems and Control (hybrid systems, differential inclusions, [[Optimal control|optimal control]] with state constraints), Optimization (Complementarity problem and [[Variational inequality]]) Biology [[Biology:Gene regulatory network|Gene regulatory network]], Fluid Mechanics and [[Computer graphics]], etc.

== Components ==
The software is based on 3 main components<ref>{{citation
    |last1=Acary
    |first1=Vincent
    |last2=Perignon
    |first2=Franck
    |title=An introduction to Siconos.
    |journal=INRIA Technical Report, Pp. 45. RT-0340
    |url=http://hal.inria.fr/inria-00162911/en
    |year=2007 |type=report
 }}</ref>
* Siconos/Numerics (C API). Collection of low-level algorithms for solving basic Algebra and optimization problems arising in the simulation of nonsmooth dynamical systems
** [[Linear complementarity problem]] (LCP)
** [[Mixed linear complementarity problem]] (MLCP)
** [[Nonlinear complementarity problem]] (NCP)
** [[Quadratic programming]] problems (QP)
** Friction-contact problems (2D or 3D) (Second-order cone programming (SOCP))
** Primal or Dual Relay problems
* Siconos/Kernel. API C++ that allows one to model and simulate the nonsmooth dynamical systems. It contains
** Dynamical systems classes :  first order one, [[Lagrangian system]]s, [[Newton–Euler equations|Newton-Euler systems]]
** Nonsmooth laws :  complementarity, Relay, Friction, Contact, [[Physics:Impact (mechanics)|impact]]
* Siconos/Front-end (API Python) Mainly an auto-generated [[Software:SWIG|SWIG]] interface of the API C++ which a special support for data structure.

== Performance ==
According to peer reviewed studies published by its developers, Siconos was approximately five times faster than [[Software:Ngspice|Ngspice]] or ELDO (a commercial SPICE by [[Company:Mentor Graphics|Mentor Graphics]]) and 250 times faster than [[Software:PLECS|PLECS]] when solving a [[Engineering:Buck converter|buck converter]].<ref name="VascaIannelli2012">{{cite book|editor=Francesco Vasca and Luigi Iannelli|title=Dynamics and Control of Switched Electronic Systems: Advanced Perspectives for Modeling, Simulation and Control of Power Converters|year=2012|publisher=Springer Science & Business Media|isbn=978-1-4471-2884-7|pages=446–447|chapter=Time-Stepping via Complementarity|author=Vincent Acary}}</ref><ref>Acary, V., Bonnefon, O., Brogliato, B. (July 2010) "[https://hal.archives-ouvertes.fr/file/index/docid/423550/filename/IEEEpaper.pdf Time-Stepping Numerical Simulation of Switched Circuits Within the Nonsmooth Dynamical Systems Approach]", ''Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on'' (Volume:29, Issue: 7), pp. 1042-1055, {{doi|10.1109/TCAD.2010.2049134}}</ref>

==See also==
* {{annotated link|Differential inclusion}} (an extension of the notion of [[Differential equation|differential equation]]) on which much of the NSDS theory relies
* {{annotated link|Physics:Non-smooth mechanics}}
* {{annotated link|Physics:Contact dynamics}}
* {{annotated link|Rigid body dynamics}}
* {{annotated link|Collision detection}}
* {{annotated link|Complementarity theory}}
* {{annotated link|Stiff equation|Stiffness}}, which affects ODEs/DAEs for functions with "sharp turns" and which affects numerical convergence

==References==
<references/>

==External links==
*[http://siconos.gforge.inria.fr The official Siconos site]
*[http://haltools.inrialpes.fr/Public/afficheRequetePubli.php?auteur_exp=acary&CB_auteur=oui&CB_titre=oui&CB_article=oui&css_prive=http://bipop.inrialpes.fr/people/acary/CSShal.css&langue=Anglais&tri_exp=annee_publi&tri_exp2=typdoc&ordre_aff=TA&__utma=197383159.1567354679.1253654614.1255333653.1255379940.8&__utmz=197383159.1255333653.7.3.utmccn=(organic)|utmcsr=google|utmctr=jean%20acary%20monerie|utmcmd=organic&menu=Export&Fen=Aff&css=http://bipop.inrialpes.fr/people/acary/CSShal.css] other related publications

{{Physics engines}}

{{DEFAULTSORT:SICONOS - SImulation and COntrol of NOnsmooth Systems)}}
[[Category:Free science software]]
[[Category:Free software programmed in C]]
[[Category:Free software programmed in C++]]
[[Category:Software using the Apache license]]
[[Category:Dynamical systems]]
[[Category:Scientific simulation software]]

{{Sourceattribution|Siconos}}