采用ESO的Boost变换器改进滑模控制

Improved sliding mode control using ESO’s Boost converter

本文针对Boost变换器的负载电阻扰动和输入电压变化等系统不确定因素对输出电压的影响,提出了一种基于扩张状态观测器的改进滑模控制算法.首先,设计扩张状态观测器对系统状态、负载电阻和输入电压值进行估计,然后基于得到的估计值采用改进滑模控制算法设计系统控制器.通过理论分析,证明了Boost变换器闭环控制系统的稳定性.仿真和实验结果表明,与传统的滑模控制算法相比,本文所提出的控制算法更好地改善了系统的跟踪性能,提升了系统的鲁棒性.

In this paper,an improved sliding mode control algorithm based on extended state observer is proposed for the influence of system uncertainties such as load resistance disturbance and input voltage change on the output voltage of Boost converter.Firstly,the extended state observer is designed to estimate the system state,load resistance and input voltage.Then,based on the estimated value,the improved sliding mode control algorithm is used to design the system controller.Through theoretical analysis,the stability of the closed-loop control system of Boost converter is proved.The simulation and experimental results show that compared with the traditional sliding mode control algorithm,the proposed control algorithm can better improve the tracking performance and the robustness of the system.