基于离散自适应滑模控制的DC-DC变换器的设计与仿真

摘要

Aiming at the single-ended forward circuit,this paper presents a control method and simulation method of DC-DC converter under discrete time system. The control part adopts the discrete adaptive sliding mode control algorithm.By analyzing the state equation of the circuit,the control matrix of the adaptive sliding mode control algorithm is obtained,which should apply to the discrete adaptive sliding mode control algorithm. On the basis of theoretical analysis,due to the particularity of digital control switching power supply,Simulink –Saber co-simulation are used to simulate the circuit and adjust the parameters of the control part to fully verify the performance of the discrete adaptive sliding mode controller. The experimental results show that the discrete adaptive control has fast transient response characteristics and good robustness when the system parameters change.%针对单端正激电路,本文提出了一种离散时间系统下的DC-DC转换器的控制方式以及仿真方法.控制部分采用离散自适应滑模控制算法,通过分析电路的状态方程得到自适应滑模控制算法所需的各个控制矩阵,应用这些矩阵配置离散自适应滑模控制算法.在理论分析的基础上,由于数字控制开关电源的特殊性,通过Matlab-Simulink与Synopsys-Saber来对电路对该电路进行联合仿真并对控制部分的参数进行调整,充分验证离散自适应滑模控制器的控制性能.实验结果表明,当系统参数变化时,离散自适应控制具有快速的瞬态响应特性和良好的鲁棒性.