Speed and Torque Control of Induction Motor by Using Robust H∞ Mixed-Sensitivity Problem Via T-S Fuzzy Model

In this article we investigate on robust mixed-sensitivity H∞ control for speed and torque control of induction motor (IM). In order to simplify the design procedure the Takagi---Sugeno (T---S) fuzzy approach is introduced to solve the nonlinear model Problem. Loop-shaping methodology and Mixed-sensitivity problem are developed to formulatefrequency-domain specifications. Then a regional poleplacement output feedback H∞ controller by using linear matrixinequalities(LMIs) teqnique for each linear subsystem of IM T-S fuzzy model is employed. Parallel Distributed Compensation(PDC) is used to design the controller for the overall system . Simulation results are presented to validate the effectiveness of the proposed controller even in the presence of motor parameter variations and unknown load disturbance