论文部分内容阅读
为了解决Buck变换器非线性特征在控制器设计中带来的困难,在电感电流连续模式下,构建了Buck变换器的T-S模糊模型;同时考虑到系统参数摄动和外部扰动等因素,在T-S模糊模型的基础上,利用Lyapunov函数方法和线性矩阵不等式(LMI)方法构造全局模糊滑模面,并设计模糊滑模控制器。仿真结果表明:应用模糊滑模控制器的Buck变换器的上升时间和调节时间均在15ms左右,跟踪效果好,抗扰性强,具有良好的动态性能。
In order to solve the problem of non-linear buck converter in the controller design, the TS fuzzy model of Buck converter is built in the continuous current mode of inductor current. Considering the factors of system parameter perturbation and external disturbance, Based on the fuzzy model, the global fuzzy sliding mode surface is constructed by Lyapunov function method and linear matrix inequality (LMI) method, and the fuzzy sliding mode controller is designed. The simulation results show that Buck converter with fuzzy sliding mode controller has a rise time and settling time of about 15ms, good tracking performance, strong immunity and good dynamic performance.