移相全桥 ZVS DC-DC 变换器的复合控制

摘要

A self-tuning PID compound control strategy based on system identification is studied to overcome the poor anti-interference of ZVS DC-DC converter. The strategy based on pole placement method is adopted,and the recursive least square method is also used to identify and estimate the parameters for realizing the adaptive control of this system. A controller based on compound control strategy is designed in this study. Finally,the self-tuning PID control is demonstrated to have good dynamic and steady characteristics by the MATLAB simulation,in parti-cular,a strong anti-interference is got as well,thus verifying the rationality of such method.%针对移相全桥 ZVS DC-DC 变换器抗干扰性差的缺点，研究了基于系统辨识的自校正 PID复合控制策略。该策略是在采用极点配置法的基础上，又采用递推最小二乘法对系统的参数进行了辨识和估计，从而使系统达到自适应控制的目的。设计了复合控制策略下的控制器，最后通过 MATLAB仿真结果验证了自校正 PID 复合控制使系统具有良好的动态和稳定特性，尤其是具有较强的抗干扰性，从而验证了方法的合理性。