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In this paper we mainly focus on the design of updated laws for the coefficients in PID controllers for a class of second-order nonlinear systems. Fuzzy logic systems have the advantages in approximating nonlinear uncertain functions, furthermore, the consequent of a Takagi-Sugeno(TS, for short) fuzzy model contains the linear combination of the base functions with input signals which makes it feasible...
This paper proposes a novel direct robust adaptive fuzzy output tracking control schemes for a class of uncertain nonlinear systems with external disturbance. The adaptive fuzzy controller is based on the definition of compressor and limiter with adjustable parameters, then a controller with updated laws of the parameters of the compressor and estimate values of the fuzzy approximation accuracies...
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