摘要
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。
A T-S fuzzy model for a Buck converter with nonlinear characteristics in continuous current mode (CCM) was developed to improved the application of Buck converters in controllers.A fuzzy sliding surface based on the T-S fuzzy model using Lyapunov function and the linear matrix inequality (LMI) method accounts for uncertainties in system parameters and exterior disturbances.Simulations indicate that the Buck converter with the fuzzy sliding mode controller provides good tracking performance with strong inter...
出处
《清华大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2008年第S2期1854-1858,共5页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金资助项目(60774030)
江南大学创新团队发展计划(2007)