Аңдатпа
In the tasks of recognizing and predicting the states of complex objects, a common situation is when it is necessary to make decisions with contradictory or incomplete data, which is caused by the presence of a certain level of “noise” or gaps in the data. To solve the existing problem, interval fuzzy sets, or fuzzy sets of type-2, are used, when the values of the membership functions are not a number, but an interval. The report shows the appearance of an interval output in fuzzy logic systems of type-2 when using interval membership functions and the construction of a set of fuzzy models of type-2 using set-theoretic operations for making effective decisions in applied problems.