说明：  对实际应用buck电路进行了simulink模型搭建，建立了电流电压双环pid控制，针对模型调参，搭建了buck电路的平均开关模型进行了一键整定。
(The Simulink model is built for the practical application of buck circuit, and the current and voltage double loop PID control is established. In order to adjust the parameters of the model, the average switching model of the buck circuit is set up and a key setting is made.)