Automatic learning of general type-2 fuzzy logic systems using simulated annealing

Majid Almaraashi, Robert John, Adrian Hopgood

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

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    Abstract

    This paper reports on a new approach for automatic learning of general type-2 fuzzy logic systems (GT2FLSs) using simulated annealing (SA). The learning process in this work starts without an initial interval type-2 fuzzy system and has an objective to optimize all membership function parameters involved in the general type-2 fuzzy set in two stages. This is a novel methodology for learning GT2FLSs using the vertical-slices representation. The methodology used here is based on a proposed parameterization method presented in a previous work to ease the design of GT2FLSs. Two models of GT2FLSs have been applied using two different type-reduction techniques. The first technique is the sampling method, which is non-deterministic. The second technique is the vertical-slices centroid type-reduction (VSCTR), which is deterministic. Both models as well as an interval type-2 fuzzy logic system (IT2FLS) model have been applied to predict a Mackey-Glass time series. A comparison of the results of modeling these problems using the three models showed more accurate modeling for the GT2FLSs when using the VSCTR deterministic defuzzification method. It has also been shown that a GT2FLS with VSCTR defuzzification is more able to handle uncertainty than an IT2FLS, although the latter was faster.

    Original languageEnglish
    Title of host publicationProceedings of the 2014 IEEE International Conference on Fuzzy Systems, FUZZ-IEEE
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages2384-2390
    Number of pages7
    ISBN (Electronic)9781479920723
    DOIs
    Publication statusPublished - 8 Sept 2014
    Event2014 IEEE International Conference on Fuzzy Systems - Beijing, China
    Duration: 6 Jul 201411 Jul 2014

    Publication series

    NameFUZZ-IEEE Proceedings Series
    ISSN (Print)1098-7584

    Conference

    Conference2014 IEEE International Conference on Fuzzy Systems
    Abbreviated titleFUZZ-IEEE 2014
    Country/TerritoryChina
    CityBeijing
    Period6/07/1411/07/14

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