Unknown system dynamic estimator-based fast fixed-time control of Buck converters

被引：0
|
作者：
Chen Q. [1 ]
Huang J.-Y. [1 ]
Nan Y.-R. [1 ]
机构：
[1] College of Information Engineering, Zhejiang University of Technology, Hangzhou
来源：
Kongzhi yu Juece/Control and Decision | 2022年 / 37卷 / 03期
关键词：
Buck converter; Enhanced reaching law; Fast fixed-time control; Unknown system dynamic estimator;
D O I：
10.13195/j.kzyjc.2020.1087
中图分类号：
学科分类号：
摘要：
This paper proposes an unknown system dynamic estimator-based fast fixed-time control scheme for Buck converters with unknown system dynamics including parameter uncertainties, input voltage fluctuations and load variations, etc. A first-order low-pass filter-based estimator is first designed to realize feedforward compensation for the unknown system dynamics. Based on the output voltage error and unknown dynamic estimation, a fixed-time sliding surface and feedback controller are designed, such that the output voltage can quickly converge to the neighborhood near the reference, and the controller has good anti-disturbance ability. Meanwhile, by constructing an arc cotangent auxiliary function, a novel enhanced reaching law is presented to improve the convergence speed of the system states and reduce the controller chattering. Finally, simulation and experimental results validate the effectiveness of the proposed scheme. Copyright ©2022 Control and Decision.
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页码：746 / 752
页数：6
相关论文
共 18 条
  • [1] Xu Q W, Zhang C L, Wen C Y, Et al., A novel composite nonlinear controller for stabilization of constant power load in DC microgrid, IEEE Transactions on Smart Grid, 10, 1, pp. 752-761, (2019)
  • [2] Shi T N, Guo Y T, Song P, Et al., A new approach of minimizing commutation torque ripple for brushless DC motor based on DC-DC converter, IEEE Transactions on Industrial Electronics, 57, 10, pp. 3483-3490, (2010)
  • [3] Walker G R, Sernia P C., Cascaded DC-DC converter connection of photovoltaic modules, IEEE Transactions on Power Electronics, 19, 4, pp. 1130-1139, (2004)
  • [4] Tan S C, Lai Y M, Cheung M K H, Et al., On the practical design of a sliding mode voltage controlled buck converter, IEEE Transactions on Power Electronics, 20, 2, pp. 425-437, (2005)
  • [5] Komurcugil H., Adaptive terminal sliding-mode control strategy for DC-DC buck converters, Isa Transactions, 51, 6, pp. 673-681, (2012)
  • [6] Komurcugil H., Non-singular terminal sliding-mode control of DC-DC buck converters, Control Engineering Practice, 21, 3, pp. 321-332, (2013)
  • [7] Chen Q, Qian N, Nan Y R., Fixed-time adaptive control for buck converters, Control and Decision, 35, 5, pp. 1183-1190, (2020)
  • [8] Ding S H, Zheng W X, Sun J J, Et al., Second-order sliding mode controller design and its implementation for buck converters, IEEE Transactions on Industrial Informatics, 14, 5, pp. 1990-2000, (2018)
  • [9] Wang J X, Li S H, Yang J, Et al., Extended state observer-based sliding mode control for PWM-based DC-DC buck power converter systems with mismatched disturbances, IET Control Theory & Applications, 9, 4, pp. 579-586, (2015)
  • [10] Wang Z, Li S H, Wang J X, Et al., Generalized proportional integral observer based backstepping control for DC-DC buck converters with mismatched disturbances, IEEE International Conference on Industrial Technology, pp. 1783-1789, (2016)
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