Stator flux and torque decoupling control for induction motors with resistances adaptation

An adaptive state feedback control has been designed for direct torque and stator flux regulation with a fifth-order model of an induction motor. The control design is based on exact input-output decoupling linearisation via non-linear state feedback. To achieve decoupling control, it is shown that the tracking dynamics with respect to the outputs (stator flux amplitude and electrical torque) is asymptotically stable at an admissible operating equilibrium. In the adaptive control, the uncertainty in the resistances of the stator and the rotor is considered, and the adaptation law is design to guarantee the boundedness of parameter estimation and output regulation performance. Finally, simulation results are presented to demonstrate the availability of the proposed controller.