Anti-disturbance finite-time sliding mode control for liquid-filled spacecraft with input saturation

被引：0
|
作者：
Song X.-J. [1 ]
Wang H.-W. [1 ]
Lyu S.-F. [2 ]
机构：
[1] College of Mechanical Engineering, Inner Mongolia University of Technology, Hohhot
[2] College of Science, Inner Mongolia University of Technology, Hohhot
来源：
Kongzhi yu Juece/Control and Decision | 2021年 / 36卷 / 05期
关键词：
Attitude maneuver; Disturbance observer; Finite-time control; Liquid filled spacecraft; Sliding mode control;
D O I：
10.13195/j.kzyjc.2019.0820
中图分类号：
学科分类号：
摘要：
In this paper, the problem of attitude control for three-axis stabilized liquid-filled spacecrafts with unknown external disturbance, uncertain parameters and input saturation is studied, and an attitude maneuver control method based on anti-disturbance finite-time sliding mode control is proposed. The sloshing of liquid fuel in a partially liquid-filled tank is equivalent to a spherical pendulum model, and the coupled dynamic equation of a liquid-filled spacecraft is derived by using the conservation law of momentum moment. A finite-time integral sliding mode disturbance observer is designed firstly to ensure that the lumped disturbances in the control system can be estimated in finite time. Then, based on the designed disturbance observer, an anti-disturbance finite-time fast terminal sliding control strategy is presented, and it is proved that the state of the closed-loop system is finite-time stable under the control law, and converges to the specified fast terminal sliding mode surface. Moreover, input saturation constraint is overcome by introducing auxiliary variables to compensate for overshooting. The simulation results show the effectiveness and robustness of the control strategy. Copyright ©2021 Control and Decision.
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页码：1078 / 1086
页数：8
相关论文
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