本文从工程实践的要求出发,将建模和控制器的设计紧密结合,提出了一种新型DC-DC变换器大信号建模方法,基于这一模型,将线性时变不确定系统的鲁棒控制方法应用于DC-DC变换器的控制器设计.本文所提出的建模和控制器设计方法适用于全部四种基本PWM型DC-DC变换器.计算机仿真和实验证明,本文设计的控制器对输入电源电压扰动和线性负载电阻扰动具有良好的鲁棒性,且实现方案简单易行.

From an engineering point of view,a novel large-signal modeling method is proposed for dc-dc converters in this paper.Based on this model,a robust control strategy of linear uncertainty systems with time-varying uncertainty is applied to control of dc-dc converters.The modeling method and control strategy is simple and applicable to all four basic PWM converters.The results of computer simulations and experiments prove that the controller designed in this paper is robust to disturbances of input voltage and linear resistive load.