Fuzzy logic

Fuzzy logic

1. Attempt to apply human way of thinking

2. Can handle vague information

   • Difficult to be specified
     • Little hot
     • Very cold
     • Brigh light

3. Superset of boolean logic

   • Recognizes more than simple true or false values
   • Allows define values in the dark areas between conventional evaluations of precise logic

4. Functioning

   • Fuzzified input variables and enter the reasoning engine, later the output is defuzzyfied
   • Elements
     • Fuzzy sets
       • Number range 0-1 indicating the degree of membership on an element on a set
     • Vague concepts
       • Predicates that lead to a clear division of the universe in the True and False values
     • Memberhsip functions
       • The percentage of an element to fit in the group
     • Logical operators
       • Truth table through a extension principle
     • Linguistic variables
       • Name of a fuzzy set