Predefined-time sliding mode control for VTHL launch vehicle in reentry phase

被引：0
|
作者：
Xu S. [1 ]
Guan Y. [1 ]
Pu J. [1 ]
Wei C. [1 ]
机构：
[1] Department of Astronautics Engineering, Harbin Institute of Technology, Harbin
来源：
Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2023年 / 44卷 / 07期
关键词：
extended state observer; predefined-time control; reentry phase; sliding mode control; Vertical Takeoff and Horizontal Landing(VTHL) launch vehicle;
D O I：
10.7527/S1000-6893.2022.26857
中图分类号：
学科分类号：
摘要：
A novel predefined-time attitude control method for VTHL reusable launch vehicle is proposed in the pres⁃ ence of parameter uncertainties and disturbances in the reentry phase. The attitude errors of the VTHL reusable ve⁃ hicle can be stabilized to zero in a predefined time which is independent of any initial condition. Firstly，a novel nonsin⁃ gular predefined-time sliding mode surface is proposed based on the inverse tangent function，on which the states con⁃ verge to the origin in predefined time. Subsequently，a predefined-time sliding mode controller is designed to ensure that the sliding mode arrives in predefined-time. The sinusoidal compensation function is introduced to avoid singularity of the controller. Moreover，with the usage of the predefined-time extended state observer，the robustness of the con⁃ trol system is enhanced，and the chattering phenomenon is alleviated. Finally，the predefined-time convergence of the attitude tracking errors is analyzed by the Lyapunov method. Various numerical simulation results are carried out，dem⁃ onstrating the effectiveness of the proposed control scheme. © 2023 AAAS Press of Chinese Society of Aeronautics and Astronautics. All rights reserved.
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