The VSC (Variable Structure Control) with SM (Sliding Mode) dynamics is a well known theory used to define a robust controller for a plant in the presence of model uncertainty and disturbance input. In this paper a method for defining a Sugeno type of Fuzzy Logic Controller (FLC) parameters, derived from VSC design considerations, is proposed. The idea is to generate a set of VSC controllers, related to different bounds on model uncertainties and disturbances, and use the interpolatory capability of the fuzzy paradigm to merge the VSC behavior in only one structure. Moreover a heuristic algorithm for the on-line FC parameter tuning is given. The global stability of the proposed controller is also demonstrated.Simulations show that the FC obtained performs better than the basic VSC counterpart in the presence of unmodeled dynamics and disturbances.
Adaptive Fuzzy Logic Controller Synthesis Via Sliding Mode Approach / C., Bonivento; Fantuzzi, Cesare; L., Martini. - STAMPA. - (1995), pp. 345-351. (Intervento presentato al convegno Third European Conference on Control tenutosi a Rome (Italy) nel 5-8 September 1995).
Adaptive Fuzzy Logic Controller Synthesis Via Sliding Mode Approach
FANTUZZI, Cesare;
1995
Abstract
The VSC (Variable Structure Control) with SM (Sliding Mode) dynamics is a well known theory used to define a robust controller for a plant in the presence of model uncertainty and disturbance input. In this paper a method for defining a Sugeno type of Fuzzy Logic Controller (FLC) parameters, derived from VSC design considerations, is proposed. The idea is to generate a set of VSC controllers, related to different bounds on model uncertainties and disturbances, and use the interpolatory capability of the fuzzy paradigm to merge the VSC behavior in only one structure. Moreover a heuristic algorithm for the on-line FC parameter tuning is given. The global stability of the proposed controller is also demonstrated.Simulations show that the FC obtained performs better than the basic VSC counterpart in the presence of unmodeled dynamics and disturbances.
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