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An adaptive robust attitude tracking control law based on switched nonlinear systems is presented for a variable structure near space vehicle (VSNSV) in the presence of uncertainties and disturbances. The adaptive fuzzy systems are employed for approximating unknown functions in the flight dynamic model and their parameters are updated online. To improve the flight robust performance, robust controllers...
This paper deals with the chaos phenomenon of doubly fed induction generator(DFIG). The Takagi-Sugeno (T-S) fuzzy model of DFIG chaos system is built. Based on the fuzzy Lyapunov function approach, a robust optimal controller is designed in the form of linear matrix inequality (LMI). Thus the chaos of DFIG with parametric uncertainties is eliminated. The simulation result shows that the fuzzy optimal...
This paper deals with the chaos phenomenon of asymmetric nonlinear Chua's circuit for wind power generation systems. The Takagi-Sugeno (T-S) fuzzy model of asymmetric nonlinear Chua's circuit chaos system is built. Based on the optimal theory, the extreme sensitivity in the state trajectory with respect to the initial conditions is exhibited and an adaptive optimal fuzzy controller is designed in...
Due to its great potential value in theory and application, synthesized power and frequency control strategies of nonlinear wind power energy storage systems, especially combining with intelligent control methods, have been a focus in the academe. A synthesized power and frequency control method based on fuzzy neural networks presents nonlinear systems is proposed in this paper. The controller parameters...
This paper deals with the stability analysis of a class of T-S fuzzy systems. Based on the piecewise fuzzy Lyapunov function, an adaptive optimal fuzzy control design method for stabilization of T-S fuzzy system is derived. This method reduces the conservatism of both piecewise Lyapunov function and fuzzy Lyapunov function. The stability condition obtained is more relaxed and the control system has...
Due to its great potential value in theory and application, synthesized power and frequency control strategies of nonlinear wind power generation systems, especially combining with intelligent control methods, have been a focus in the academe. A synthesized power and frequency control method based on fuzzy neural networks presents nonlinear systems in this paper. The controller parameters were designed...
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