Comparative Study of Fuzzy Operators in Risk Level Calculation

In this paper different fuzzy operators will be introduced and compared. The three basic operations of crisp sets (negation, conjunction, and disjunction) can be generalized for fuzzy sets in an infinite number of ways. Therefore different functions can be the best for different problem implementations, so the operator selection is application-dependent. The model used for comparison is a fuzzy logic-based hierarchical multilevel risk calculation model for physical exercise. The test was performed in Simulink – Fuzzy Logic Toolbox environment for several typical groups of the patients. The results are compared and analyzed.