用深度学习让卫星自主识别太空物体,提升碰撞预警能力。
Toward Onboard AI-Enabled Solutions to Space Object Detection for Space Sustainability
- 结合SE模块与ViT、GELAN结构,设计轻量高效视觉模型。
- 在轨检测精度达mAP50:0.751,mAP50:95:0.280,性能优于基线。
- 模型算力降低30%,功耗下降2.5%,适合卫星边缘部署。
低地球轨道(LEO)大型卫星星座的快速扩张使空间资产成为未来关键基础设施,支持全球互联网接入和深空任务中继。有效空间物体检测(SOD)是实现碰撞评估与规避的核心挑战。本文研究基于深度学习(DL)模型的视觉传感器在SOD任务中的可行性与有效性,提出融合挤压-激励(SE)层、视觉变换器(ViT)与广义高效层聚合网络(GELAN)的新型模型,并在真实SOD场景下评估其表现。实验结果表明,所提模型在交并比阈值0.5时达到0.751的平均精确度(mAP50),在0.5至0.95交并比范围内平均精确度(mAP50:95)达0.280。相比基准模型GELAN-t,GELAN-ViT-SE模型将mAP50提升至0.751(+0.030),mAP50:95提升至0.274(+0.008),同时将计算量从7.3 GFLOPs降至5.6,峰值功耗由2080.7 mW降至2028.7 mW,降幅2.5%。
原文摘要 · Abstract (English)
The rapid expansion of advanced low-Earth orbit (LEO) satellites in large constellations is positioning space assets as key to the future, enabling global internet access and relay systems for deep space missions. A solution to the challenge is effective space object detection (SOD) for collision assessment and avoidance. In SOD, an LEO satellite must detect other satellites and objects with high precision and minimal delay. This paper investigates the feasibility and effectiveness of employing vision sensors for SOD tasks based on deep learning (DL) models. It introduces models based on the Squeeze-and-Excitation (SE) layer, Vision Transformer (ViT), and the Generalized Efficient Layer Aggregation Network (GELAN) and evaluates their performance under SOD scenarios. Experimental results show that the proposed models achieve mean average precision at intersection over union threshold 0.5 (mAP50) scores of up to 0.751 and mean average precision averaged over intersection over union thresholds from 0.5 to 0.95 (mAP50:95) scores of up to 0.280. Compared to the baseline GELAN-t model, the proposed GELAN-ViT-SE model increases the average mAP50 from 0.721 to 0.751, improves the mAP50:95 from 0.266 to 0.274, reduces giga floating point operations (GFLOPs) from 7.3 to 5.6, and lowers peak power consumption from 2080.7 mW to 2028.7 mW by 2.5\%.
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