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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.
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