Type-3 Fuzzy System for Dynamic System Control

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Aliyev R.; Abizada S. R.; Abiyev R. H.

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Journal Paper

Paper Information

Journal: Iranian Journal of Fuzzy Systems Year:2024 | Volume:21 | Issue:3 Page(s): 65-76

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Information Journal Paper

Title

Type-3 Fuzzy System for Dynamic System Control

Author(s)

Aliyev R. | Abizada S. R. | Abiyev R. H. | Issue Writer Certificate

Keywords

Fuzzy controller

Type-3 membership function

type-3 fuzzy logic

control system

Abstract

Many dynamic processes are characterized by parametric or structural uncertainties due to internal and externaldisturbances. Existing deterministic models could not handle the uncertainties inherent in these processes. A valuablealternative to control these processes is the use of a type-3 fuzzy system. Since type-3 fuzzy systems use threedimensionalmembership functions, they have more capacity to model uncertainties. This paper introduces the designof a type-3 fuzzy logic system (FLS) for the control of dynamic plants. Utilizing type-3 fuzzy logic, the architectureof the type-3 fuzzy control system (T3FCS) is proposed. The knowledge base of the controller is constructed and itsdesign stages are presented. The inference mechanism of type-3 FLS is developed using α slices and interval type-3membership functions. The proposed type-3 FLS is utilized for controlling nonlinear dynamic plants. The modelingof the proposed T3FCS is performed and transient response characteristic is derived using different stepwise excitationsignals. A comparison of the designed system with the type-1 FLS-based system is provided. The obtained simulationresult demonstrates the efficiency of using the proposed type-3 FLS in the control of dynamic systems characterized byuncertainties.

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