自适应观测器提升低推力航天器近距导航精度与稳定性
Adaptive Navigation Strategy for Low-Thrust Proximity Operations in Circular Relative Orbit
- 根据状态估计动态调整观测器增益，实现快速收敛
- 仿真验证轨迹跟踪精度更高，控制切换更少
- 适合自主航天器编队飞行与非合作目标检测
本文提出一种基于自适应观测器的导航策略，用于圆形相对轨道（CRO）场景下的航天器近距操作，如编队飞行和非合作目标探测。该方法根据状态估计结果动态调节观测器增益，以实现状态估计的快速收敛和低噪声敏感性。通过李雅普诺夫分析保证系统稳定性和估计精度。基于视觉传感器数据的仿真验证了该方法在真实条件下的有效性。相比传统时不变增益观测器，所提方法显著提升了轨迹跟踪精度，并减少了控制输入切换次数，为自主航天器定位与控制提供了有前景的解决方案。
原文摘要 · Abstract (English)
This paper presents an adaptive observer-based navigation strategy for spacecraft in Circular Relative Orbit (CRO) scenarios, addressing challenges in proximity operations like formation flight and uncooperative target inspection. The proposed method adjusts observer gains based on the estimated state to achieve fast convergence and low noise sensitivity in state estimation. A Lyapunov-based analysis ensures stability and accuracy, while simulations using vision-based sensor data validate the approach under realistic conditions. Compared to classical observers with time-invariant gains, the proposed method enhances trajectory tracking precision and reduces control input switching, making it a promising solution for autonomous spacecraft localization and control.
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