Fuzzy observer design for near space vehicle with application to sensorfault estimation

In this study, a novel fuzzy observer design approach is proposed for nearspace vehicle (NSV,) with unknown output disturbance. Firstly, the Takagi-Sugeno(T-S) fuzzy model is employed to approximate NSV dynamics with outputdisturbance. Letting the output disturbance term to be an auxiliary statevector, an augmented descriptor model is constructed for NSV dynamics. A fuzzystate-space observer is then designed for the augmented descriptor system.,which can estimate the state vector and output disturbance of NSV dynamicssimultaneously. The proposed observer technique is further applied to estimatethe sensor fault of NSV dynamics. Finally, simulation results demonstrate theeffectiveness of the designed fuzzy observer in this paper. ICIC International © 2010.