基于GPIO的DC-DC Buck变换器Backstepping不匹配抗干扰设计

GPIO-based DC-DC Buck Converter Backstepping Mismatch Jamming Design

针对在DC-DC Buck变换器系统中由于负载不确定引起的变换器性能下降,提出了基于干扰估计技术的新型Backstepping控制方案。结合广义比例积分观测器(GPIO)技术对扰动进行估计,并在每一步的虚拟控制律设计中引入扰动的估计,利用反步法消除不匹配的扰动,最后通过李雅普诺夫函数方法实现闭环系统的全局稳定性分析。与传统的Backstepping相比,该方法即使在扰动不满足匹配的条件下,也可有效地保证系统有更好的抗干扰性能。仿真结果证明了该方法的有效性。

Considering the DC-DC buck converter system performance degradation caused by an uncertain load,a new control scheme is proposed based on backstepping technique of interference estimation techniques.Generalized PI observers technology is combined to estimate the disturbance,and the virtual control law is introduce into every step,the use of backstepping can eliminate the mismatched disturbance,At last,global stability analysis of closed-loop system is achieved by the method of Lyapunov function.Compared with the traditional backstepping method,this method can effectively ensure better interference performance,even in the so-called disturbance does not meet the matching conditions.The simulation results demonstrate the effectiveness of the effective method.