A design of uncertainty trajectory observer for a class of T-S fuzzy models

When using the T-S fuzzy model to design a controller in a control system, the control performance depends, sometimes largely, on the way that copes with the gap between the T-S fuzzy model and the system concerned. The gap is viewed as uncertainty in the T-S fuzzy model in this paper. While it is difficult to estimate the uncertainty itself, the paper presents a unique observer that is able to effectively track the uncertainty trajectory, which can be further used in controller design in an effort to improve the control performance. Also, example is provided to demonstrate the effectiveness of the approach proposed.

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