用深度学习实现水下机器人传感器快速对齐,仅需25秒即可完成,无需复杂动作或外部定位。
ResAlignNet: A Data-Driven Approach for INS/DVL Alignment
- 基于1D ResNet-18构建数据驱动对齐模型,直接优化传感器坐标系关系。
- 仅用25秒数据即达0.8°对齐精度,收敛速度比传统方法快65%。
- 可在仿真数据训练后直接用于真实设备,适合各类水下任务快速部署。
自主水下航行器依赖惯性导航系统(INS)与多普勒测速仪(DVL)的融合导航,在无卫星信号的挑战环境中成功执行任务。该融合效果高度依赖于传感器参考系的精确对齐。传统的基于模型的对齐方法存在收敛时间长、依赖预设运动模式及外部辅助传感器等问题,严重限制了操作灵活性。本文提出ResAlignNet,一种基于1D ResNet-18的数据驱动对齐方法,将对齐问题转化为深度神经网络优化,作为在轨解决方案,仅需船上传感器,无需外部定位或复杂机动,即可在数秒内实现快速收敛。此外,该方法展现出良好的Sim2Real迁移能力,可在合成数据上训练后直接部署于真实传感器数据。基于Snapir自主水下航行器的实验验证表明,ResAlignNet仅用25秒数据即实现0.8°的对齐精度,相比传统速度法收敛时间减少65%。其轨迹无关特性消除了运动模式要求,支持无需长时间准备的即时部署,实现了跨场景、跨传感器配置的鲁棒自适应对齐,显著提升水下导航能力。
原文摘要 · Abstract (English)
Autonomous underwater vehicles rely on precise navigation systems that combine the inertial navigation system and the Doppler velocity log for successful missions in challenging environments where satellite navigation is unavailable. The effectiveness of this integration critically depends on accurate alignment between the sensor reference frames. Standard model-based alignment methods between these sensor systems suffer from lengthy convergence times, dependence on prescribed motion patterns, and reliance on external aiding sensors, significantly limiting operational flexibility. To address these limitations, this paper presents ResAlignNet, a data-driven approach using the 1D ResNet-18 architecture that transforms the alignment problem into deep neural network optimization, operating as an in-situ solution that requires only sensors on board without external positioning aids or complex vehicle maneuvers, while achieving rapid convergence in seconds. Additionally, the approach demonstrates the learning capabilities of Sim2Real transfer, enabling training in synthetic data while deploying in operational sensor measurements. Experimental validation using the Snapir autonomous underwater vehicle demonstrates that ResAlignNet achieves alignment accuracy within 0.8° using only 25 seconds of data collection, representing a 65\% reduction in convergence time compared to standard velocity-based methods. The trajectory-independent solution eliminates motion pattern requirements and enables immediate vehicle deployment without lengthy pre-mission procedures, advancing underwater navigation capabilities through robust sensor-agnostic alignment that scales across different operational scenarios and sensor specifications.
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