Second order sliding mode observer based on twisting algorithm for induction motor

This work is devoted to the synthesis of an observer for induction motor. Indeed, most control laws require a precise knowledge on model at each sampling time. However, the inaccessibility of some states and large variations of some parameters such as the stator and the rotor resistances, during induction motor operating, represent major challenges for performances of this system. In this sense, a second order sliding mode observer based on twisting algorithm is proposed for recovering induction machine internal states. This observer presents the interest of second order sliding mode in terms of convergence in finite time and robustness against parameters variation. Simulation results show performances of this observer.