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Interval Type 2 Fuzzy Logic Systems in Python

Project description


NumPy based toolkit for Interval Type 2 Fuzzy Logic Systems (IT2FLS) simulation.


PyIT2FLS is published under GNU General Public License v3.0. If you are using the developed toolkit, please cite the paper PyIT2FLS: A New Python Toolkit for Interval Type 2 Fuzzy Logic Systems.

    title={PyIT2FLS: A New Python Toolkit for Interval Type 2 Fuzzy Logic Systems},
    author={Amir Arslan Haghrah and Sehraneh Ghaemi},


PyIT2FLS can be installed by unzipping the source code in one directory and using this command:

(sudo) python3 install


There are five examples provided over github page along with the toolkit which are listed as below:

  • Ex1: Defining an Interval Type 2 Fuzzy Set (IT2FS)

  • Ex2: Application of join and meet operators and plotting the outputs

  • Ex3: Defining a simple (MIMO) IT2FLS

  • Ex4: Prediction of the Mackey-Glass chaotic time series with PSO-based parameter tuning

  • Ex5: Designing Interval Type 2 Fuzzy PID (IT2FPID) controller for a time-delay linear system

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