含未知恒功率负载的升降压变换器无电流传感有限时间控制  

Current sensorless finite time control for buck⁃boost converter with unknown constant power load

作　　者：贺伟 陈文豪 HE Wei;CHEN Wenhao(Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,Nanjing University of Information Science&Technology,Nanjing 210044,China;School of Automation,Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学大气环境与装备技术协同创新中心,南京210044 [2]南京信息工程大学自动化学院,南京210044

出　　处：《南京信息工程大学学报》2025年第1期108-116,共9页Journal of Nanjing University of Information Science & Technology

基　　金：国家自然科学基金(62173205)。

摘　　要：本文主要解决含未知恒功率负载的升降压变换器无电流传感有限时间控制问题.恒功率负载的负阻抗特性会产生低频振荡,对系统的稳定性造成不利影响.首先,为重构不可测的电感电流和未知功率负载,基于动态回归扩展和混合技术,设计具有有限时间收敛特性的降阶广义参数估计观测器,将状态观测转换为参数估计问题.其次,基于反馈线性化方法,将此非线性系统转化为线性系统,并设计快速终端滑模控制器来稳定系统.随后,结合快速终端滑模控制器与广义参数估计观测器,提出针对此系统的无电流传感有限时间控制器.基于级联系统的有限时间稳定结论,证明闭环系统的有限时间稳定性.最后,通过仿真和实验结果验证所提出的无电流传感有限时间控制的有效性.This paper addresses the current sensorless finite time control for the buck⁃boost converter with unknown constant power load.The low frequency oscillation caused by negative impedance of constant power loads can adversely affect the stability of buck⁃boost converters.First,to reconstruct unavailable inductor current and unknown power load,a reduced⁃order generalized parameter estimation based observer with finite time convergence is designed on the basis of dynamic regression extension and mixing techniques,which is able to reformulate the state observation as parameter estimation.Second,the nonlinear system is converted into a linear one via a feedback linearization approach,and a Fast Terminal Sliding Mode Controller(FTSMC)is designed to stabilize the system.Subsequently,a current sensorless finite time controller is proposed by combining the FTSMC with the generalized parameter estimation based observer.Then the finite time stability of the closed⁃loop system is proved by the finite time stability result of the cascaded system.Finally,the effectiveness of the proposed current sensorless finite time control scheme is verified by simulation and experiment results.

关 键 词：升降压变换器 恒功率负载 无传感控制 有限时间控制 快速终端滑模控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]