Vahid Azimi - Islamic Azad University, South Tehran
Mohammad Ali Nekoui - K. N. Toosi University of Technology
Ahmad Fakharian - Islamic Azad University, Qazvin

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

IM, LMIs, Mixed-Sensitivity Problem, Robust Control, T-S Fuzzy Model