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A fuzzy variable structure approach to feedback regulation of uncertain dynamical systems, with application to robotics. (English) Zbl 0872.93050
Summary: This paper develops a fuzzy logic-based control design methodology for a large class of nonlinear uncertain dynamical systems. The proposed control design approach combines the powerful tools of fuzzy logic and approximate reasoning with the advanced mathematical synthesis techniques used in variable structure control systems theory. The rationale for the proposed control design approach is motivated by the results of a recent study that has rigorously established some connections between fuzzy logic and variable structure control systems. The results of this paper represent a step in the right direction for systematic design of a less expert-dependent fuzzy logic control. To illustrate the merits of the new control approach, the latter is applied to a 2 degree of freedom robot manipulator. Preliminary simulation results suggest that the proposed control design deals effectively with the chattering problem encountered when the classical variable structure control is used alone.
MSC:
93C42 Fuzzy control/observation systems
93B12 Variable structure systems
93C85 Automated systems (robots, etc.) in control theory
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