负载电阻下变论域模糊PI控制对Buck-Boost变换器的影响

Analysis of the influence of resistance change on fuzzy PI control in variational domain of Buck-Boost converter

为提高Buck-Boost变换器的控制精度,提出一种变论域模糊PI控制器方法.该方法利用模糊PI控制器来实时调整系统的参数,并通过引入变论域解决输入量过大或过小时控制器的参数无法自适应的问题.Matlab/Simulink仿真实验结果表明,本文提出的变论域模糊PI控制方法在控制精度和响应速度方面均优于传统PI控制和模糊PI控制方法,因此本文方法对提高Buck-Boost变换器系统的稳定性具有很好的参考价值.

In order to improve the control accuracy of buck-boost converter,a fuzzy PI controller method is proposed.This method uses the fuzzy PI controller to adjust the system parameters in real time,and introduces the variable theory domain to solve the problem that the parameters of the controller can not be adaptive if the input is too large or too small.Matlab/Simulink simulation results show that the proposed fuzzy PI control method is better than the traditional PI control and fuzzy PI control methods in terms of control accuracy and response speed.So the method to improve the stability of the Buck-Boost converter system has the very good reference value.