Unknown input observer-based active fault tolerant control for induction machine

• Published in: International journal of dynamics and control Vol. 6; no. 2; pp. 726 - 738
• Main Authors: Guezmil, Amal, Berriri, Hanen, Sakly, Anis, Mimouni, Mohamed Faouzi
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.06.2018; Springer Nature B.V
• Subjects: Active control; Circuit design; Complexity; Control; Control and Systems Theory; Dynamic stability; Dynamical Systems; Engineering; Fault tolerance; Liapunov functions; Short circuits; Vibration; Unknown input observer; Backstepping controller; Fault detection; Induction machine; Fault tolerant control
• ISSN: 2195-268X; 2195-2698
• DOI: 10.1007/s40435-017-0334-6

This paper proposes an unknown input observer scheme based active fault tolerant control for induction machine with inter-turn short-circuit fault. This method is developed using a backstepping controller which can make system outputs to track their desired reference signal in finite-time and obtain a better dynamic responses and performances. The closed-loop stability is established based on Lyapunov function. An unknown input observer is developed not only to estimate the machine states but also to detect the inter-turn short-circuit fault. When the fault is detected, a signal alarm is provided to trigger the switch between measured stator current and estimated ones. The backstepping controller will be reconfigured in order to compensates the inter-turn short-circuit fault impact. Simulations were performed in MATLAB/Simulink environment to highlight the designed approach performances and robustness with respect to inter-turn short-circuit fault occurrence.