基于滑模控制的DC-DC降压变换器实验平台

为了实现DC-DC降压变换器的高精度控制，设计了一种基于滑模控制的输出电压调节器。首先根据DC-DC降压变换器的工作原理建立了系统的动态模型；接着利用转换后的受扰动态模型设计了滑模控制器，同时基于李雅普诺夫函数证明了闭环系统的稳定性；最后使用Matlab/Simulink软件和DC-DC降压变换器硬件电路搭建了实验测试平台。测试结果表明与传统的PID控制方法相比，DC-DC降压变换器系统在所设计的滑模控制器的作用下可以获得更快的动态性能与更强的扰动抑制能力。该实验平台不仅有利于大学生理解和掌握滑模控制理论，还可以提高大学生的工程应用能力。

Experimental Platform of DC-DC Buck Converter Based on Sliding Mode Control

In order to realize the high-precision control of the DC-DC buck converter, an output voltage regulator based on sliding mode control is proposed. Firstly, the dynamic model of the system is established according to the circuit principle of the DC-DC buck converter. Then, a sliding mode controller is developed based on the disturbed dynamic model, and the stability of the closed-loop system is proved based on a defined Lyapunov function. Finally, an experimental test platform is built by using Matlab/Simulink software and the hardware circuit of the DC-DC buck converter. The results show that compared with the traditional PID control method, the DC-DC buck converter system can obtain faster dynamic performance and stronger disturbance rejection ability under the action of the designed sliding mode controller. The experimental platform is not only helpful for college students to understand and grasp sliding mode control theory but also can improve their engineering application ability.