Modified Adaptive Control for Multi-Spacecraft Attitude Coordination Problems
Modified Adaptive Control for Multi-Spacecraft Attitude Coordination Problems
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DOI：
10.1109/ddcls.2018.8516072
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发表时间：
2018-05
期刊：
影响因子：
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通讯作者：
Zhuo Zhang;Huiping Li
中科院分区：
文献类型：
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作者：
Zhuo Zhang;Huiping Li
研究了航天器姿态协调问题的分布式控制。设计了一种自适应滑模控制器，使多航天器姿态同步归零。然后提出了一种改进的无抖振控制器，以消除由切换函数引起的控制输入的抖振。利用李雅普诺夫稳定性理论证明了该方法能保证多航天器姿态收敛到一个有限的范围内。最后，通过数值算例验证了该方法在存在外部干扰和模型不确定性的情况下，能够在消除抖振的同时获得较高的控制精度。
The distributed control of spacecraft attitude coordination problems is developed in this paper. An adaptive sliding-mode (SM) controller is designed to steer the attitude of multiple spacecrafts to synchronously reach zero. Then a modified chattering-free controller is proposed to eliminate the chattering of control inputs caused by the switching function. By utilizing the Lyapunov stability theory, we can prove that the presented approach ensures the multi-spacecraft attitude converge into a limited range. Finally, numerical examples are provided to illustrate that the modified control approach can achieve high control accuracy with eliminating the chattering in the presence of external disturbances and model uncertainties.