Supervisory Control of Fuzzy Discrete Event Systems
Yang Cao, Mingsheng Ying · IEEE Transactions on Systems Man and Cybernetics Part B (Cybernetics) · 2005
To cope with situations in which a plant's dynamics are not precisely known, we consider the problem of supervisory control for a class of discrete event systems modeled by fuzzy automata. The behavior of such discrete event systems is described by fuzzy languages; the supervisors are event feedback and can only disable controllable events with any degree. In this new sense, we present a necessary and sufficient condition for a fuzzy language to be controllable. We also study the supremal controllable fuzzy sublanguage and the infimal controllable fuzzy superlanguage.