Project updates: October 2013

It is our pleasure to announce the immediate release of a FOMCON toolbox update. Although some changes in the API are still possible in future versions, the core of the toolbox is now quite stable. Bearing this in mind, we have moved the project to the beta stage.

New features

  • New analog implementation module added; please see [1] for some hands-on examples of using it. A GUI for this feature will be implemented and included in a toolbox update.
  • Several fractional-order transfer function analysis tools added, including fractional-order root locus analysis tool;
  • Global and local function configuration options have been made available further enhancing the flexibility of the toolbox; in particular, it is now possible to save and restore all the configuration parameters in the fpid_optim() tool, a useful feature to effectively handle the abundance of available optimization options;
  • All graphical user interfaces reworked to further facilitate the workflow, e.g. the fotfid() tool now fully supports FO process model identification; several new components added;
  • New fractional-order transfer function blocks in Simulink: in these, model coefficients and exponents are entered numerically, so they can be used as building blocks for more complex systems.

Bug fixes

  • NB! The calling sequence to the fractional-order transfer function identification function fid() has changed! Please see the documentation for further details;
  • Numerous bugs fixed, see the bug tracker for a list of major closed bugs.


The toolbox is available for download in the corresponding section of the website. The documentation has been updated as well. Please clean the FOMCON website page cache if you have any problems with viewing it. Legacy documentation is still available at

We also hope, that the release cycle for the toolbox will be shorter from now on. Kindly report any bugs you may encounter!

Note on upgrading the FOMCON toolbox: please overwrite existing files with the new ones.


[1]A. Tepljakov, E. Petlenkov, and J. Belikov, Efficient analog implementations of fractional-order controllers,” in Proc. of the 14th International Carpathian Control Conference (ICCC), 2013, pp. 377–382.
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  1. Posted November 9, 2016 at 18:57 | Permalink


    Is any possibility to introduce initial condition in the block fractional integrator?

    Many thanks,

    • Posted November 14, 2016 at 11:31 | Permalink

      Not at the moment. While it’s not inconceivable, I’m still looking for a proper way to implement it.

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