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According to the basic principle and the non-linear characteristic of the buck converter, this paper separately constructs the T-S fuzzy model of the buck electric circuit in two kinds of patterns which are CCM (continuous current mode) and DCM (discontinuous current mode). In order to get the circuit state equations and T-S fuzzy models in these two patterns, this paper introduces a switching function...
Based on T-S fuzzy model, piecewise fuzzy Lyapunov function (PFLF) is adopted in the analysis of the stability of the a class of uncertainty nonlinear systems by defining the fuzzy Lyapunov function in each overlapping rules. The PFLF makes use of the premise of rules and the membership functions of the system. The sufficient condition is expressed with LMI on stability and performance of nonlinear...
Considering the nonlinearity characteristic of buck-boost converter and combining with the fine part-linear characteristic of T-S fuzzy model, a novel T-S fuzzy model of buck-boost converter is proposed in this paper. Based on the constructed model, a parametrical design method of the buck-boost converter fuzzy controller is put forward via QLF method. And the parameters of controller can be obtained...
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