Composite attitude control for flexible spacecraft with simultaneous disturbance attenuation and rejection performance
Composite attitude control for flexible spacecraft with simultaneous disturbance attenuation and rejection performance
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DOI：
10.1177/0959651811415757
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发表时间：
2012-02
期刊：
影响因子：
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通讯作者：
H. Liu;L. Guo;Y. Zhang
中科院分区：
文献类型：
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作者：
H. Liu;L. Guo;Y. Zhang
本文提出了一种具有刚性中心毂和柔性附件的在轨航天器的复合姿态控制方法。所建立的姿态控制模型包括刚体振动模态、空间环境干扰、测量噪声和模型不确定性。该模型被配制成具有两种类型的干扰输入的动态系统。针对柔性航天器系统受多个干扰的情况，提出了一种同时具有干扰抑制和抑制性能的复合控制律。设计了基于扰动观测器的弹性振动前馈补偿控制器。针对空间环境干扰、测量噪声和模型不确定性，设计了H∞状态反馈控制器，实现了姿态的鲁棒控制。仿真结果表明，将扰动观测器与H∞状态反馈控制相结合，可以提高姿态控制系统的性能。
In this paper, a composite attitude control approach for orbiting spacecraft with rigid central hubs and flexible appendages is presented. The established attitude control model consists of the vibration modes excited by the rigid body, the space environment disturbances, the measurement noises, and the model uncertainty. The model is formulated into a dynamic system with two types of disturbance inputs. A composite control law with the simultaneous disturbance attenuation and rejection performance is presented for the flexible spacecraft system subject to multiple disturbances. The disturbance-observer-based control is designed for feedforward compensation of the elastic vibration. The H∞ state-feedback controller is designed to perform the robust attitude control in the presence of the space environment disturbances, measurement noises, and the model uncertainty. Numerical simulations show that the performance of the attitude control systems can be improved by combining the disturbance observer with H∞ state-feedback control.