Fuzzy State/Disturbance Observer Design for T–S Fuzzy Systems With Application to Sensor Fault Estimation

Zhiwei Gao, Xiaoyan Shi, Steven X. Ding

Research output: Contribution to journalArticlepeer-review

187 Citations (Scopus)

Abstract

A novel fuzzy-observer-design approach is presented for Takagi-Sugeno fuzzy models with unknown output disturbances. In order to decouple the unknown output disturbance, an augmented fuzzy descriptor model is constructed by supposing the disturbance to be an auxiliary state vector. A fuzzy state-space observer is next designed for the augmented fuzzy descriptor system, and the simultaneous estimates of the original state and disturbance are thus obtained. The proposed observer technique is further applied to estimate sensor faults. Finally, a numerical example is given to illustrate the design procedure, and the simulation results show the desired tracking performance. The preknowledge of the disturbance and fault is not necessary for our design. Moreover, the considered disturbance and sensor fault can be in any form.
Original languageEnglish
Pages (from-to)875-880
JournalIEEE Transactions on Systems, Man, and Cybernetics, Part B (Cybernetics)
Volume38
Issue number3
DOIs
Publication statusPublished - Jun 2008

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