Rapid multi-target pointing and high accuracy attitude control steering law of variable speed control moment gyroscopes
Rapid multi-target pointing and high accuracy attitude control steering law of variable speed control moment gyroscopes
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DOI：
10.2514/6.2008-7015
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发表时间：
2008-12
期刊：
影响因子：
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通讯作者：
Masaki Takahashi;Yasuyuki Nanamori;K. Yoshida
中科院分区：
文献类型：
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作者：
Masaki Takahashi;Yasuyuki Nanamori;K. Yoshida
为了实现敏捷航天器的快速姿态机动和高精度控制，提出了一种变速控制力矩陀螺(VSCMG)舵律。在所提出的控制律中，为了保持VSCMG的高操纵性，并控制VSCMG的内部扰动，对VSCMG的初始框架角进行了优化。此外，在快速姿态机动过程中，VSCMG的作用类似于经典的CMG。在高精度指向控制中，VSCMG就像一个反作用轮(RW)，以减少万向架运动引起的内部扰动。数值仿真结果表明，通过根据航天器的姿态误差切换几种转向方式，所提出的控制律可以快速、高精度地控制灵活的航天器。此外，通过与Vadali的转向律进行比较，证实了所提出的律对敏捷航天器的多目标快速捕获和指向控制的有效性。
In this study, to perform both a rapid attitude maneuver and a high accuracy control of an agile spacecraft, a Variable Speed Control Moment Gyroscope (VSCMG) steering law is proposed. In the proposed law, in order to maintain high manipulability and to control an internal disturbance of the VSCMG, initial gimbal angles of the VSCMG are optimized. In addition, the VSCMG acts like a classical CMG during the rapid attitude maneuver. During the high accuracy pointing control, the VSCMG acts like a Reaction Wheel (RW) to reduce the internal disturbance due to the gimbal motion. From the results of the numerical simulation, it was confirmed that the proposed law can control the agile spacecraft rapidly and high accuracy by switching several steering modes according to the attitude error of the spacecraft. In addition, the usefulness of the proposed law was confirmed in comparison with the steering law of Vadali for the rapid maltitarget acquisition and pointing control of the agile spacecraft.