Sliding mode control of the nonlinear systems

Non linear control of the squirrel induction motor propelling an Electric Vehicle (EV) is designed using sliding mode theory. The proposed scheme uses an adaptive flux and speed observer that is based on a full order model of the induction motor in the indirect vector-controlled drive. The sliding mode tools allow us to separate the control from these two outputs torque and flux. To take account of parametric variations, a model-based approach is used to improve the robustness of the control law despite these perturbations. Simulations were carried out on a test vehicle propelled by an induction motor to evaluate the consistency and the performance of the proposed control approach. The obtained results seem to be very promising.