【摘要】 针对存在负载变化和外界干扰的Buck型变换器系统,提出一种预设时间自适应反演控制方法,给出系统调节时间最小上界值与控制参数的直接关系,减少调参复杂度。构造二次分式型虚拟控制器,避免虚拟控制器微分引起的奇异性问题,并确保输出电压在预设时间内收敛至参考电压附近邻域。仿真和实验结果验证了所提方法的有效性。更多还原

【Abstract】 A predefined-time adaptive backstepping control scheme is proposed for Buck converter system aiming at load variation and external interference, which provides the direct relationship between system’ s adjustable time and control parameters. It reduces the complexity of parameter setting. To avoid the singularity problem caused by the differential of the virtual controller, a quadratic fractional virtual controller is constructed to ensure that the output voltage converges to the reference voltage adjacency region within a predefined time. Finally, the simulation and experimental results show the effectiveness of the proposed control scheme.更多还原