液体推进卫星的无反稳定,具有对燃料密度的稳定性
Meysam Jokar1, Hassan Salarieh2, Hossein Nejat Pishkenari2
1School of Mechanical Engineering, Shiraz University, Shiraz 71936-16548, Iran.
ISA transactions
|August 20, 2025
概括
这项研究引入了一种新的边界反控制,用于有粘性燃料的卫星,提高了态度控制的准确性和速度. 该方法可以提高卫星的稳定性,而不需要内部燃料传感器.
科学领域:
- 航空航天工程 航空航天工程
- 控制系统 控制系统
- 流体动力学 流体动力学
背景情况:
- 液体推进器卫星中的燃料污染使跟踪控制复杂化.
- 现有的方法经常过于简化燃料运动或使用离散模型,导致不稳定和不准确.
- 稳定无限维的卫星燃料系统是具有挑战性的,因为潜在的溢出不稳定性.
研究的目的:
- 解决具有粘性燃料的卫星隔膜油箱系统的边界反稳定问题.
- 制定控制规则,以确保气态/轨迹稳定性,尽管燃料污染和密度变化.
- 通过解决没有内部传感器的燃料动态来提高卫星控制的有效性.
主要方法:
- 使用汉密尔顿原理,推导控制卫星态度动态的非线性抛物线局部普通微分方程.
- 使用控制Lyapunov功能方法构建边界反规律.
- 开发一个控制方案,只需要刚性卫星数据和燃料边界参数,而不是内部燃料密度测量.
主要成果:
- 实现了对态度控制的根平均平方误差平均20%的降低.
- 与现有方法相比,显示了42%更快的趋同到所需态度.
- 展示了控制器对燃料密度变化的稳定性,并通过粘度考虑改善了稳定性.
结论:
- 拟议的边界反控制有效地稳定了卫星燃料系统的粘性燃料.
- 创新的控制策略提高了态度/轨迹控制的准确性和速度.
- 这种方法为卫星控制挑战提供了切实可行的解决方案,在这种情况下,内部燃料传感是不可行的.
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