JModelica.org goes to Dresden

The 8th International Modelica Conference in Dresden, March 20-22 2011, is a great opportunity to learn more about JModelica.org.

 
Modelon will also have an exhibition where you may come to meet members of the JModelica.org development team.
 
See you all in Dresden!

JModelica.org 1.5 released

We are pleased to announce that JModelica.org 1.5 is now available for download. This release contains several improvements, many of them targeted at strengthening the simulation capabilities of the platform.
 
With release 1.5, JModelica.org becomes the first open source platform to support export of Functional Mock-up Units from Modelica code.
 
Highlights:

  • Functional Mock-up Unit (FMU) export
  • Extended Modelica compliance in the compiler front-end
  • Equation sorting and BLT
  • Symbolic solution of simple equations
  • Improved simulation support for hybrid and sampled systems
  • Improved DAE initialization with Kinsol and SuperLU
  • Improved support for external functions

 
For additional information, see the release notes. A binary installer for Windows is available at the download page

Happy holiday season!

As 2010 is coming to an end, I wish all JModelica.org users, developers and collaborators a happy and restful holiday season. I also would like to thank the dedicated development team for all their efforts, and our users for their patience and enthusiasm. During this eventful year that saw many exciting developments, the project has grown, both in terms of developers and of users, and many new features have been added. The simulation package Assimulo was launched, the compiler front-end Modelica compliance was significantly improved, and FMI import support was implemented, just to mention a few of the highlights. 2011 is looking to be equally eventful, with FMU export, simulation support for hybrid and sampled systems, and support for a larger class of optimization problems on the roadmap. And don't forget to sign up for the JModelica.org tutorial at the Modelica Conference in Dresden in March - this is a great opportunity to learn more about the platform and to get hands-on experience. 
 
Best regards
Johan Åkesson 

JModelica.org 1.4 released

JModelica.org 1.4 has been released! 

  • Improved Python user-interaction functions
    • Simplified compilation, loading, simulation and loading of models
    • Easy to use handling of compiler and algorithm options
    • Interactive documentation (docstrings) improved
    • Convenient access to simulation and optimization result using Python dictionaries
  • Improved Modelica compliance
    • Support for enumerations
    • Further improvements in the support for replaceable components and classes
    • Structural diagnosis for improved error reporting
    • Automatic addition of initial equations to obtain a balanced initialization system
  • Parametric sensitivity computations
    • Support for simulation of the sensitivity equations using the Sundials integrator suite

For additional information, see the release notes. A binary installer for Windows is available at the download page

JModelica.org 1.3 released

 
We are proud to announce JModelica.org release 1.3! Some of the highlighs are:

  • Functional Mockup Interface (FMI) support
    • Load FMUs into the Python interpreter
    • Simulated FMU models using the Assimulo package
    • Run batch simulations and visualize using Python scripts
  • Support for minimum time optimization problems
    • Minimum time problems formulated in Optimica can now be translated and solved by the collocation optimization algorithm
  • Compiler frontend
    • The frontend has been improved to handle more complex cases of redeclarations
    • Support for one-to-one stream connections
  • Support for a class of external functions
    • External C functions with scalar inputs and outputs are supported

For additional information, see the release notes. A binary installer for Windows is available at the download page

JModelica.org wishes you a great summer

The JModelica.org team wishes you a great summer with greetings from the Bavarian alps - we are looking forward to an exciting fall when we will see support for stream modeling and external functions, simulation of FMUs in Python and much more. Stay tuned for release 1.3.0 in the end of August!

JModelica.org tutorial at Nordic Process Control Workshop 2010

In association with the upcoming conference Nordic Process Control Workshop, there will be a JModelica.org tutorial. The tutorial will be held on August 25 2010 and covers the topics:

  • Introduction to Modelica and JModelica.org
  • Scripting and visualization in Python
  • Solving optimal control problems
  • Parameter estimation

Please see the tutorial information page for the full program. 

JModelica.org 1.2.0b1 released

We are proud to present JModelica.org 1.2.0b1!  
New features in JModelica.org 1.2.0:

  • Modelica compliance in compiler front-ends
    • Arrays
    • Functions
    • Algorithms
  • Dynamic optimization algorithm
    • Automatic scaling of models
    • Piecewise constant control profiles in optimal control formulations supported
  • XML export
    • Model metadata export fully compliant with the Functional Mockup Interface (FMI)
    • Extended XML export of flattened, scalarized models, including user defined functions
  • Python
    • Intuitive high-level functions for common tasks, including optimization and simulation
    • High-quality linearization of DAE models computed by means of automatic differentiation
  • Assimulo
    • A Python package for simulation of dynamic models
    • Assimulo is the integrated simulation kernel of JModelica.org but may also be used stand-alone

 For more information, see the download page and the release notes.

Windows SDK release 1.3b1

 A new version (1.3b1) of the Windows SDK is available, containing the following changes:

  • Removed PySUNDIALS
  • Added Cython
  • Updated to Sundials 2.4.0 

This version of the SDK matches the requirements of the upcoming JModelica.org release 1.2.0.
The SDK bundles all required tools and provides convenient procedures for building and running JModelica.org from sources under Windows. See <http://www.jmodelica.org/sdk/>.

FMI compliance in JModelica.org

The first version of the Functional Mockup Interface (FMI) standard was recently released. FMI marks a great step forward for tool interoperability by specifying a format for exchange of compiled dynamic models, and is already supported by several tools. JModelica.org now supports export of model meta data in XML format according to the FMI standard. This feature will be included in the upcoming 1.2 release.

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