线性自抗扰控制在全桥DC–DC变换器中的应用
Application of linear active disturbance rejection control in full-bridge DC–DC converters

针对DC–DC变换器在实际应用中会受到多种输入扰动、负载扰动及电磁扰动影响的问题, 本文结合全 桥DC–DC变换器的系统模型特点, 对传统线性自抗扰控制器进行了改进. 设计了基于降阶扩张状态观测器和以比 例控制作为误差反馈律的自抗扰控制器用于实际系统, 在确保系统性能的前提下优化了参数整定过程. 仿真和实 验结果表明, 该控制系统具有比传统PI控制系统更优的快速性、鲁棒性和适应性, 且大大简化了传统自抗扰控制器 设计过程中参数过多、取值困难的问题, 具有良好的发展前景.
This paper is aimed at the problems of DC–DC converters in various applications, such as input disturbances, load disturbances and electromagnetic disturbances. The traditional linear active disturbance rejection control (LADRC) controller is improved according to the system model characteristics of full-bridge DC–DC converter. An ADRC controller based on reduced-order extended state observer and proportional control is designed for the actual system, and the parameter tuning process is optimized under the premise of ensuring system performance. Simulation and experimental results show that the control system has better speed, robustness and adaptability than traditional PI control systems. It greatly simplifies the problems of parameters selection in the design process of the traditional ADRC controllers