磁盘卫星质量矩姿态控制方法

By combining a differential tracker and a PD controller with a linear or nonlinear state observer, the aerodynamic torque of the centroid of the disk satellite is adjusted, solving the problem of complex disturbances in the attitude control of the disk satellite and achieving high-precision and low-cost attitude control.

CN118618635BActive Publication Date: 2026-07-17HARBIN INST OF TECH

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN INST OF TECH
Filing Date
2024-07-08
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Attitude control of disk satellites faces complex disturbances. Traditional methods fail to effectively consider the additional torque caused by the slider motion and the model perturbation caused by the irregular aerodynamic shape, making it difficult to achieve high-precision attitude control.

Method used

By employing a differential tracker and a PD controller combined with a linear or nonlinear state observer, the satellite's center of mass is adjusted through the displacement of the mass block, and active control is achieved using aerodynamic torque to suppress disturbances and improve robustness.

Benefits of technology

It effectively suppressed complex disturbances, improved the accuracy and robustness of satellite attitude control, and reduced fuel consumption and the complexity of the control system.

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Abstract

磁盘卫星质量矩姿态控制方法,解决了如何抑制扰动,提高卫星指向精度的问题,属于卫星姿态控制技术领域。本发明利用微分跟踪器得到卫星的期望姿态与角速度,根据期望姿态与角速度,利用PD控制器得到质量块的位移;质量块的位移包括质量块在卫星x轴、y轴的位移;根据质量块的位移得到气动力矩:Ta=‑rs×Fa;其中,Fa表示气动力矢量,rs表示卫星的质心在本体系下的矢径;根据干扰状态观测器得到卫星的扰动观测力矩得到最终的控制力矩根据控制力矩对磁盘卫星的质量块进行控制。本发明通过变质心的方式将气动力矩作为控制力矩而不是扰动力矩,从而节省了燃料,大大降低了卫星姿态控制的成本和复杂性。
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