Robust LMI-based active fault tolerant pitch control of a wind turbine using fuzzy model

Abstract

This article investigates a robust active fault tolerant control strategy for a wind turbine system involving disturbance, actuator and sensor fault. The state-space representation of the system is formulated by the Takagi-Sugeno fuzzy model, and a disturbance rejection technique is used to eliminate the wind perturbation. To guarantee the robust behavior of the system, the control signal is reconfigured via addition of a robust term. Using the Lyapunov method, some criteria, expressed in the form of linear matrix inequalities (LMIs), are provided for asymptotic stability of the estimated error. The mail results are confirmed by numerical simulations of a 1 MW wind turbine.