Backstepping control for induction machine with high order sliding mode observer and unknown inputs observer: A comparative study

In this paper, a synthesis of a speed and flux control approach for an induction machine based on backstepping strategy is designed. Indeed, the lyapunov theory is used to prove the stability of the proposed approach. To avoid the use of speed and flux sensors, a high order sliding mode observer and unknown input observer are developed to estimate the flux and the speed. In addition, the purpose of this study is to compare and evaluate the performance of each observer proposed. Numerous simulations are also shown to test the robustness of the proposed control scheme in low and high speed and presence of rotor resistance variations.