中文摘要：

基于时间延迟反馈近似思想，提出一类无源反馈控制方法，实现了电压模式Buck变换器的混沌控制。采用数据采样方式建立了被控系统的迭代映射方程，利用数值计算确定出无源反馈控制强度的调节范围，并对比分析了系统施加控制前后的Jacobian矩阵特征值轨迹。仿真和实验结果证实所提控制方式可以有效实现系统混沌行为的抑制，拓宽了输入电压的稳定范围，减小了电压和电流纹波。

英文摘要：

A kind of passive feedback chaotic control in the voltage-mode Buck converter is presented based on the approximation concept of time-delayed feedback control （TDFC）. Firstly, the sampled-data means is applied to obtain the iterate map equation of the controlled system, and the regulating range of the feedback control is ascertained out by using numerical calculation. Meanwhile the eigenvalues locus of the Jacobian matrix is contrastively analyzed fore-and-aft the control is in effect. The results of simulation and experiment confirm that the proposed method can control the chaos state of the Buck converter into period-l, widen the stable range of the inout voltage, and decrease the voltage and current ripple as well.