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Adaptive Proportional Integral Observer Design for Interval Type 2 Takagi–Sugeno Fuzzy Systems

Author

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  • Atef Khedher
  • Ilyes Elleuch
  • Kamal BenOthman

Abstract

In this paper, the problem of fault estimation in systems described by Takagi–Sugeno fuzzy systems is studied. A proportional integral observer is conceived in order to reconstruct state and faults which can affect the studied system. Proportional integral observer can easily estimate actuator faults which are assimilated to be as unknown inputs. In order to estimate actuator and sensor faults, a mathematical transformation is used to conceive an augmented system, in which the initial sensor fault appears as an unknown input. Considering the augmented state, it is possible to conceive an adaptive observer which is able to estimate the whole state and faults. The noise effect on the state and fault estimation is also minimized in this study, which provides some robustness properties to the proposed observer. The proportional integral observer is conceived for nonlinear systems described by Takagi–Sugeno fuzzy models.

Suggested Citation

  • Atef Khedher & Ilyes Elleuch & Kamal BenOthman, 2021. "Adaptive Proportional Integral Observer Design for Interval Type 2 Takagi–Sugeno Fuzzy Systems," Mathematical Problems in Engineering, Hindawi, vol. 2021, pages 1-13, July.
    • Handle: RePEc:hin:jnlmpe:5317391
    DOI: 10.1155/2021/5317391
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