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This paper addresses the usage of the boundary-layer concept in removing the chatter that occurs in sliding mode control applications in the area of controlling the speed and flux of induction motors. Although this concept succeeds in removing the chatter from the system, it introduces a stability problem. This paper proposes a fuzzy controller that acts as a supervisory controller for a sliding mode...
This paper presents the design of a fuzzy logic sliding mode controller to control a permanent magnet synchronous motor. Fuzzy logic is introduced to the system to solve the chattering problem associated with sliding mode controllers. Based on the proposed switching surface, a switching control law that satisfies the hitting condition and guarantees the existence of the sliding mode is designed using...
This paper proposes a new fuzzy gain scheduled proportional, integral and derivative (FGPID) controller by using Takagi-Sugeno (TS) fuzzy system to the load frequency control problem in multi-area power systems. The TS fuzzy inference engine is chosen and the range of the controller is selected suitably to enhance the output performance of the system. Simulation results demonstrate the ability of...
This paper presents the design and implementation of fuzzy-SMC-PI methodology to control the flux and speed of an induction motor. The fuzzy-SMC-PI is basically a combination of sliding mode control (SMC) and PI control methodologies through fuzzy logic. In this strategy, SMC is responsive during transient state while PI control becomes fully active in the steady state area. This will ensure that...
This paper presents a fuzzy gains scheduled proportional and integral (FGPI) controller for load frequency control (LFC) of the Iraqi National Super Grid system (INSGS). A linear-time-invariant mathematical model is derived for the system that consists of six generating stations with various types of turbines. Maintaining frequency of each area and the net tie-line power at scheduled value due to...
This paper presents the design and implementation of a bang-bang-like sliding mode control (SMC) methodology to control the flux and speed of an induction motor. The proposed control structure uses a fuzzy logic membership function to combine the bang-bang controller with a PI controller to reduce the chatter created by the switching control input. In this strategy, SMC is responsive during transient...
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