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中文摘要：
研究Buck变换器的瞬态特性与全局滑模系数的关系,分析滑态移动参数的选取方法,给出一种实现全局切换函数的方法。分析Buck变换器稳态工作时的输出电压纹波,提出全局滑模控制Buck变换器的瞬态情形的判定条件。利用Matlab/Simulink实现全局滑模控制器并进行仿真研究。仿真和实验结果表明,全局滑模控制Buck变换器的瞬态情形判定条件和瞬态初值赋定方法正确有效,全局滑模系数和滑态移动参数的选取方法合理,全局滑模控制较传统滑模控制具有相近的负载瞬态特性和更好的鲁棒性。
英文摘要：
The relation between transient performance and global sliding coefficients of Buck converter was studied. The design of sliding-mode moving coefficients was analyzed and the implementation of global switching function was proposed. The output voltage ripple of Buck converter was analyzed and determination of transient operation status was given. The global sliding mode controller was realized in Matlab/Simulink. Simulation and experimental results verify the validity of the proposed methods for the determination of transient operation status,the evaluation of transient initial value and the design rule of global sliding coefficients. Compared with conventional sliding mode control,the proposed global sliding mode control has similar load transient performance and better Robustness
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