一个多点去中心化控制,用于减轻灵活空间结构的振动,使用反应轮执行器
Chen Bifa1,2, Jianbin Liao3,4, Jin Yan3,4
1School of Marine Engineering, Jimei University, Xiamen, China. 202361000021@jmu.edu.cn.
Scientific reports
|May 6, 2024
概括
灵活的空间结构振动通过使用反应轮 (RW) 执行器的分散控制策略来减轻. 这种方法显著减少了航天器态度控制的振动时间.
科学领域:
- 太空飞船工程 太空飞船工程
- 控制系统 控制系统
- 结构动力学 结构动力学
背景情况:
- 灵活的空间结构中的大振幅低频振动损害了航天器的姿态稳定性和指向精度.
- 有效的振动减轻对于保持运营完整性和任务成功至关重要.
研究的目的:
- 提出和研究一种多点去中心化控制策略,以利用反应轮 (RW) 执行器减轻灵活空间结构中的振动.
- 通过理论分析,数值模拟和实验验证来证明这种控制策略的有效性.
主要方法:
- 导出模态坐标中的多个RW执行器的太阳能阵列的运动方程.
- 基于自然频率和模式形状的去中心化控制策略的设计,以抑制结构反应.
- 闭环动态系统稳定性和性能的理论证明.
主要成果:
- 分散的控制策略显著减少了振动减弱时间:朝向太阳的机动为85.25%,休息到休息的机动为94.16%.
- 由于执行器的增加,总质量的微小2%的增加会产生显著的振动减少.
- 实验结果证实了拟议的控制方法的有效性.
结论:
- 建议使用RW执行器的多点去中心化控制策略是灵活空间结构中减轻振动的有效方法.
- 这种方法在振动减弱时间方面提供了显著的改进,同时减少了最小的质量损失,证明了它在航天器设计方面的潜力.
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