ROBUST ADAPTIVE-CONTROL OF INDUCTION-MOTORS

In this paper, we present a new approach to sliding mode control for i nduction motors. The novelty is in the sliding variable formulation. U nlike previous approaches, where a linear combination of system states is used, our definition is nonlinear and dynamic and, when the system is in sliding mode, an adaptive reference signal is realized which ca n explicitly counteract mismatched parametric uncertainties. This meth od is robust to parameter variations and the stability analysis is sim ple. Full state measurements are needed for implementation. Load torqu e and rotor resistance can be unknown but bounded.