A robust adaptive approach to wind turbine pitch actuator component fault estimation

Motived by wind turbine pitch actuator component fault estimation problem, a robust adaptive fault estimation procedure is proposed in this paper. The estimation of a component fault which is a multiplicative fault, is not as straightforward a problem as the estimation of an additive fault. The proposed fault estimator is based on an adaptive observer structure where the observer gain and adaptive law are computed using linear matrix inequality (LMI) and linear parameter varying (LPV) techniques. Both wind turbulence and sensor noise are considered as external disturbances. The simulation results show the usefulness and effectiveness of the proposed approach.