Improved complementary sliding mode control for Buck converter

被引：0
|
作者：
Cai Z.-Z. [1 ]
Zeng Q.-S. [1 ]
Sun G.-H. [1 ]
机构：
[1] School of Astronautics, Harbin Institute of Technology, Heilongjiang, Harbin
来源：
Kongzhi Lilun Yu Yingyong/Control Theory and Applications | 2023年 / 40卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Buck converter; disturbance observer; improved complementary sliding mode control; Lyapunov stability; matched and mismatched disturbances; robustness;
D O I：
10.7641/CTA.2023.20365
中图分类号：
学科分类号：
摘要：
An improved complementary sliding mode control(CSMC) strategy based on the disturbance observer (DOB) is proposed in this paper to solve the control problem of Buck converter system with matched and mismatched disturbance. Firstly, the mathematical model of Buck converter with many kinds of disturbance was established, we rewrite it to a standard second-order cascade control system. The lumped disturbance in the formula was combined, separately, as matched and mismatched disturbances. Secondly, two DOBs are designed to estimate the matched and mismatched disturbance respectively in the system equation, which can track the disturbance signal in finite time, so the controller can suppress the influence of various uncertainties in the system. Then, the complementary sliding mode surface is designed and an improved complementary sliding mode reaching law based on the equivalent control is proposed, which preserves the robustness inside the boundary layer, improves the dynamic performance of the controller, reduces the static error, and broadens the selection range of boundary layer parameter. Finally, the stability of the controller is proved based on the Lyapunov theory. Digital simulation shows that the proposed improved CSMC controller combined with DOB can effectively suppress the matched and mismatched disturbance, achieve a faster convergence rate and higher tracking accuracy. © 2023 South China University of Technology. All rights reserved.
引用
收藏
页码：1873 / 1879
页数：6
相关论文
共 24 条
  • [1] FANG Y, KONG H, LIU T., Nonlinear disturbance observer-based sliding mode control for the PMSM with matched and mismatched disturbances, Mathematical Problems in Engineering, 2020, (2020)
  • [2] AYOP R, TAN C W., Rapid prototyping of photovoltaic emulator using buck converter based on fast convergence resistance feedback method, IEEE Transactions on Power Electronics, 34, 9, pp. 8715-8723, (2018)
  • [3] CHEN X, LIU G., Sensorless optimal commutation steady speed control method for a non-ideal Back-EMF BLDC motor drive system including Buck converter, IEEE Transactions on Industrial Electronics, 67, 7, pp. 6147-6157, (2020)
  • [4] SALIMI M, SOLTANI J, MARKDEHI G A, Et al., Adaptive nonlinear control of the DC-DC buck converters operating in CCM and DCM, International Transactions on Electrical Energy System, 23, 8, pp. 1536-1547, (2013)
  • [5] WANG Z, LI S, LI Q., Continuous nonsingular terminal sliding mode control of DC-DC boost converters subject to time-varying disturbances, IEEE Transactions on Circuits and Systems II-Express Briefs, 67, 11, pp. 2552-2556, (2020)
  • [6] SRIRAM V B, SENGUPTA S, PATRA A., Indirect current control of a single-phase voltage-sourced boost-type bridge converter operated in the rectifier mode, IEEE Transactions on Power Electron, 18, 5, pp. 1130-1137, (2003)
  • [7] BABAZADEH A, MAKSIMOVIC D., Hybrid digital adaptive control for fast transient response in synchronous buck DC-DC converters, IEEE Transactions on Power Electron, 24, 11, pp. 2625-2638, (2009)
  • [8] XU Q, YAN Y, ZHANG C., An offset-free composite model predictive control strategy for DC/DC buck converter feeding constant power loads, IEEE Transactions on Power Electron, 35, 5, pp. 5331-5342, (2020)
  • [9] ZHANG C L, WANY J X, LI S H., Robust control for PWM-based DC-DC buck power converters with uncertainty via sampled-data output feedback, IEEE Transactions on Power Electron, 30, 1, pp. 504-515, (2015)
  • [10] SILVA O, HERNNDEZ V, ANTONIO C., DC/DC buck power converter as a smooth starter for a DC motor based on a hierarchical control, IEEE Transactions on Power Electron, 30, 2, pp. 1076-1084, (2015)
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