Energy-Feedback Load Simulation Algorithm Based on Fuzzy Control

Applied Sciences

Gang Zhou¹  Ning Ou²  Haisong Luo²  Jiaxiang Xue²  Zhihe Fu³  Xiaowei Cai³  Huangsheng Xie³ 

[1]Dongguan Large Electronics Co., Ltd., Dongguan 523070, China

[2]School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China

[3]School of Physics and Mechanical and Electrical Engineering, Longyan University, Longyan 364012, China

关键词: energy feedback;    load simulation;    fuzzy control;    small-signal model;   

DOI  :  10.3390/app12115519

来源: DOAJ

【 摘 要 】

In order to solve the problem that the traditional Proportional Integral (PI) controller cannot take into account both response speed and input current overshoot and cannot adapt to complex working conditions, an energy-feedback DC load simulation control algorithm based on fuzzy control was proposed. By adding a fuzzy adaptive PI setting to the traditional load simulation control algorithm, the dynamic response performance of the system and the accuracy of load simulation were improved. A small-signal model of a load analog boost circuit was established based on the state average method. Based on the phase margin, the PI parameter setting of series correction was completed, and the corresponding fuzzy control rules were formulated to identify the response state. Simulation results show that the regulation time of constant current load simulation based on a fuzzy control strategy is shortened by 75.2%, the steady-state error is reduced by 60%, and the overshoot is reduced from 28.3% to 7.47%. The prototype test results show that the maximum relative error of input current load simulation is only 4.50%, and the system response speed can meet the requirements of variable load simulation. The results show that the load simulation control algorithm based on fuzzy control has the characteristics of high precision and excellent dynamic characteristics.

【 授权许可】

Unknown