本设计对滑模变结构控制进行相关的研究,以Buck型变换器的控制为重点,通过对基本型的三阶滑模变结构控制方法、改进型的滑模变结构控制方法和基于等效理论的定频滑模控制方法的仿真,调节控制系统的参数,最后完成仿真，实验波形验证理论。-The design of the variable structure control studies related to control Buck Converter for emphasis, through the basic third-order sliding mode variable structure control, sliding mode variable structure control and improved based on equivalent fixed-frequency simulation sliding mode control theory, the control system tuning parameters, and finally complete the simulation experiments verify the theoretical waveform.