自抗扰控制及其在DC-DC变换器中的应用

本文将自抗扰控制引入DC-DC变换器中,详细介绍了自抗扰控制器的原理和结构,并提供了调制Buck-Boost DC-DC变换器的仿真参数及硬件电路实验.通过对该变换器模型参数改变和外部扰动的仿真和实验研究,证明自抗扰控制对电力电子变换器这类非线性系统和不稳定对象具有良好的控制效果,对其外扰及对象模型参数的变化具有良好的适应性和鲁棒性.此方法不仅克服了经典PID控制的缺点,又保留了其结构简单,鲁棒性强的优点,是一类很有发展前景的控制策略.

Auto-Disturbance Rejection Control and Its Application to DC-DC Converter

In order to make the electronic converter be of better performance, by analyzing the characteristic of the classical PID control, a new type of nonlinear PID control method-auto-disturbance rejection control (ADRC) is proposed. The control theory and the structure of ADRC are presented; the simulation and experimental results are also given when the method is applied to Buck-Boost DC-DC converter. The results prove that ADRC controller can achieve in good effects such as strong robustness, stability and adaptability against the parameters perturbation and the extraneous disturbance. ADRC not only improves the conventional PID control, but also remains its advantages of the simple structure and strong robustness. It is demonstrated that ADRC is an effective control method and it has a promising future for nonlinear system and unstable plant.