Logika Fuzzy dan aplikasinya .•Kurva Segitiga •Kurva Trapesium •Kurva Gauss •Kurva Sigmoid

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Logika Fuzzy dan aplikasinya

Dewi Liliana, M.KOM

IT PNJ

Logika Fuzzy

Logika Fuzzy, sering juga disebut himpunan fuzzy

Himpunan fuzzy mampu merepresentasikan estimasi manusia yang bersifat ambigu.

Fuzzy Logic History

In 1965,Fuzzy Set Theory was introduced by Professor Lotfi A. Zadeh(University of California at Berkeley).

In 1974,Professor Ebrahim Mamdani (London University) applied the Fuzzy IF-THEN rule reasoning for automatic operation of a steam engine and that was the beginning of fuzzy control application.

In 1980,the first industrial application report of a fuzzy controlled automatic operation system in a cement factory in Denmark was published.

By 1987,many applications of fuzzy logic control were published.

In 1990,the application of fuzzy logic to home electronics in Japan made a "fuzzy boom." The fuzzy boom in Japan had a strong impact on Korea and the United States. Now much research is carried out in worldwide.

Terminologi Logika Fuzzy

Linguistic uncertainty. Logika Fuzzy berkaitan denganbahasa ketidakpastian (linguistic uncertainty).

Linguistic Variable dapat dinyatakan secara kuantitatifdengan fungsi keanggotaan/membership function.

Fuzzification. Berdasarkan fungsi keanggotaan, nilaifuzzy untuk variabel masukan dikalkulasi/dihitung derajatkeanggotaannya.

Rules dibangun dengan linguistic variable untuk menggambarkan fungsi dari sistem. Biasanya

berbentuk Antecedent/Consequent IF x [AND/OR] y THEN z.

Model Linguistic Uncertainty

Standard Operations of Fuzzy Set

Complement set A , union , and intersection represent the standard operations of fuzzy theory and are arranged as:

Fungsi Keanggotaan(Membership Function)

Kurva Segitiga

Kurva Trapesium

Kurva Gauss

Kurva Sigmoid

Kurva Segitiga

Kurva Segitiga

Contoh menghitung membership function

A = (-3, 2, 4) ; B = (-1, 0, 6)

Kurva Trapesium

Kurva Trapesium

Kurva Gauss/Lonceng