Fault Tolerant Controller Using Interval Type-2 TSK Logic Control Systems: Application to Three Interconnected Conical Tank System

Abstract

Type-2 fuzzy logic systems have recently been utilized in many control process due to their ability to model uncertainties. This paper proposes an inference mechanism for an interval type-2 Takagi-Sugeno-Kang fuzzy logic control system (IT2 TSK FLCS) when antecedents are type-2 fuzzy sets and consequent are crisp. This paper focus on fault-tolerant control application for the three inter-connected conical tank system with following cases: (1) Servo control without fault, and, (2) Regulatory control with the actuator, system component faults, and process disturbances. In both the cases, IAE and ISE are calculated. The methods presented in this paper facilitating the design of fault-tolerant controller design using IT2 TSK FLCs with significantly improved performance over type-1 FLCs approaches.