Disturbance observer based adaptive sliding mode controllers for fuzzy systems with mismatched disturbance

The paper has considered a problem of Takagi-Sugeno (T-S) fuzzy system with mismatched disturbance and proposed a approach named DOB-SMC which introduce the estimates of the disturbances into the design of the sliding mode controllers and the sliding surface. A disturbance observer is presented to estimate the mismatched disturbance in the paper and a adaptive sliding mode controller is also put forward to solve the problems of unknown parameters. At last of the paper, the example of ball-beam system is employed to verify the effectiveness of the method we suggested and the results prove that the approach designed in this paper is very efficient and applicable for the problems contraposed in this paper.

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