Étude comparative d'une commande non linéaire par linéarisation entrée sortie et commande robuste par mode glissant d'un moteur asynchrone

Abstract

Controlling electrical machines remains a challenge in modern industrial systems, which motivated us to choose this topic. This work compares two types of control strategies, in one hand is the advance control wish is the sliding mode control and in other hand non lineair control wish is input-output linearization control applied to an induction motor driven by an inverter. The complete system was modeled and simulated in MATLAB/Simulink. Both controllers were tested under load conditions, then subjected to a robustness test in which the rotor resistanceRr and rotor inductance Lr were intentionally increased by 50% from their nominal values. The results show that the two approaches lead to radically different performances. Sliding mode control maintained stable behavior regardless of the imposed parameter variations, while input-output linearization produced significant peaks and oscillations under the same conditions, confirming its sensitivity to parameter changes. This behavior is explained by the fact that this controller relies on an accurate model of the system once that model is no longer valid, performance degrades. In conclusion, when robustness to uncertainty is a requirement, sliding mode control is the most appropriate choice. Input-output linearization remains valid when the motor parameters are well known and stable.