Types of Fuzzy Systems

A fuzzy system is described by input-output if-then rules in the form of a rule base. The inputs and the outputs take values which are linguistic terms such as ‘small’, ‘big’, ‘low’ and ‘high’. In this context, the inputs and their linguistic terms in the ‘if’ part of the rule base are called ‘antecedents’ whereas the outputs and their linguistic terms in the ‘then’ part of the rule base are called ‘consequents’.