提出可自主执行近距离对接的凸优化框架,兼顾实时性与容错能力。
An Autonomous, End-to-End, Convex-Based Framework for Close-Range Rendezvous Trajectory Design and Guidance with Hardware Testbed Validation
- 融合深度学习感知与凸优化,实现自主轨迹设计与引导
- 仿真中对接误差仅36.85±44.46毫米,实测定位误差8.09±5.29毫米
- 适合航天器在轨服务任务,尤其适用于传感器或推进故障场景
自主卫星在轨服务需在严格安全与操作约束下完成近距离对接,同时保证星上计算高效、对感知、执行与动力学不确定性具备鲁棒性。本文提出CORTEX(凸优化对接轨迹执行)框架,集成深度学习感知模块与基于凸优化的轨迹设计与制导,包含参考轨迹重生成及异常时返回安全轨道的恢复逻辑。通过高保真软件仿真(Basilisk)与硬件在环实验验证:仿真中考虑初始状态不确定、推力误差与漏喷等扰动,最强工况下相对位置终端误差为36.85±44.46毫米,速度误差1.25±2.26毫米/秒;平面气浮台测试中18次任务(10次正常,8次模拟发动机故障与传感器失效),位置误差8.09±5.29毫米,速度误差2.23±1.72毫米/秒。
原文摘要 · Abstract (English)
Autonomous satellite servicing missions must execute close-range rendezvous under stringent safety and operational constraints while remaining computationally tractable for onboard use and robust to uncertainty in sensing, actuation, and dynamics. This paper presents CORTEX (Convex Optimization for Rendezvous Trajectory Execution), an autonomous, perception-enabled, real-time trajectory design and guidance framework for close-range rendezvous. CORTEX integrates a deep-learning perception pipeline with convex-optimisation-based trajectory design and guidance, including reference regeneration and abort-to-safe-orbit logic to recover from large deviations caused by sensor faults and engine failures. CORTEX is validated in high-fidelity software simulation and hardware-in-the-loop experiments. The software pipeline (Basilisk) models high-fidelity relative dynamics, realistic thruster execution, perception, and attitude control. Hardware testing uses (i) an optical navigation testbed to assess perception-to-estimation performance and (ii) a planar air-bearing testbed to evaluate the end-to-end guidance loop under representative actuation and subsystem effects. A Monte-Carlo campaign in simulation includes initial-state uncertainty, thrust-magnitude errors, and missed-thrust events; under the strongest case investigated, CORTEX achieves terminal docking errors of $36.85 \pm 44.46$ mm in relative position and $1.25 \pm 2.26$ mm/s in relative velocity. On the planar air-bearing testbed, 18 cases are executed (10 nominal; 8 off-nominal requiring recomputation and/or abort due to simulated engine failure and sensor malfunctions), yielding terminal errors of $8.09 \pm 5.29$ mm in position and $2.23 \pm 1.72$ mm/s in velocity.
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