Fault-tolerant control strategy of nonlinear system based on state feedback

In this paper, we proposed a novel fault tolerant control strategy based on control-law reconfiguration for the sensor failure of the nonlinear system. The Takagi-Sugeno (T-S) fuzzy model is adopted for modeling the nonlinear system and establishing fuzzy state feedback controller. When one of the sensors is failed, control action of the failure circuit is averagely shared by the remaining state feedback circuits, thus state feedback control-law is reconfigured. As a typical nonlinear system, the wind energy conversion system (WECS) is taken as an example to illustrate the effectiveness of the proposed controller.