A Linguistic Fuzzy-Sliding Mode Controller

A fuzzy-sliding mode controller (FSC) which combines a fuzzy controller (FC) with a variable structure controller (VSC) is proposed. It has a fuzzy-sliding motion similar to the conventional sliding motion of the VSC. The distinction between them is that the switching hyperpiane is a fuzzy set in the former and is a crisp set in the latter. By the FSC, one can easily determine the membership functions and the fuzzy rules. Moreover, the behavior of the controlled system can be specified beforehand.