基于Buck变换器的全局时变滑模控制器设计

为克服普通滑模变结构控制系统中系统到达滑模面之前鲁棒性差的特点，针对Buck变换器输入电压纹波干扰问题设计了一种全局时变滑模面。消除了滑模控制的趋近阶段，能够保证系统从初始时刻到终止时刻对参数摄动和干扰具有鲁棒不变性，并用仿真结果验证所用方法的有效性。

Design of Global Time-varying Sliding Mode Controller Based on Buck Converter

To solve the problem that the performance of robust was bad especially before approaching the sliding mode surface, a novel method of global time-varying sliding mode is designed for the buck converter to deal with disturbance of input voltage ripple. This method eliminates the approaching phase of sliding mode control to ensure the robust invariance of the control system with the parameter perturbations and interference from the initial point to the end point. At last the effectiveness of the methods is shown by the simulation results.