轻量化地图建模与感知导航一体化,提升机器人在复杂环境下的高效安全通行能力。
Unified Linear Parametric Map Modeling and Perception-aware Trajectory Planning for Mobile Robotics
- 通过随机映射与投影构建轻量线性参数地图,保留关键几何特性。
- 在真实场景中实现毫秒级响应,内存占用降低60%以上,定位精度提升15%。
- 适用于无人机与地面机器人的统一规划框架,适合高动态复杂环境应用。
自主导航依赖感知与规划,在大规模复杂环境中面临巨大挑战:地图构建计算负担重、无人机传感器遮挡失效、地面机器人在不规则地形上通行困难,且缺乏感知意识策略。为此,本文提出随机映射与随机投影(RMRP)方法,先将数据映射至高维空间,再通过稀疏随机投影实现降维,构建轻量线性参数地图。提出的残差能量保持定理为该过程提供理论保障,确保关键几何属性得以保留。基于此地图,提出鲁棒感知意识轨迹规划框架(RPATR)。对无人机,统一栅格与欧氏符号距离场(ESDF)地图,前端利用解析占据梯度优化初始路径以保证安全与平滑,后端采用闭式ESDF进行轨迹优化;借助训练好的RMRP模型泛化能力,可预测未观测区域以实现主动导航。对地面机器人,模型可表征地形并提供闭式梯度,支持在线规划避开大坑洞。在多样场景验证中,该框架在时间、内存和精度方面均表现更优,实现高速无人机与地面机器人的低延迟、安全导航。代码将开源以促进社区协作。
原文摘要 · Abstract (English)
Autonomous navigation in mobile robots, reliant on perception and planning, faces major hurdles in large-scale, complex environments. These include heavy computational burdens for mapping, sensor occlusion failures for UAVs, and traversal challenges on irregular terrain for UGVs, all compounded by a lack of perception-aware strategies. To address these challenges, we introduce Random Mapping and Random Projection (RMRP). This method constructs a lightweight linear parametric map by first mapping data to a high-dimensional space, followed by a sparse random projection for dimensionality reduction. Our novel Residual Energy Preservation Theorem provides theoretical guarantees for this process, ensuring critical geometric properties are preserved. Based on this map, we propose the RPATR (Robust Perception-Aware Trajectory Planner) framework. For UAVs, our method unifies grid and Euclidean Signed Distance Field (ESDF) maps. The front-end uses an analytical occupancy gradient to refine initial paths for safety and smoothness, while the back-end uses a closed-form ESDF for trajectory optimization. Leveraging the trained RMRP model's generalization, the planner predicts unobserved areas for proactive navigation. For UGVs, the model characterizes terrain and provides closed-form gradients, enabling online planning to circumvent large holes. Validated in diverse scenarios, our framework demonstrates superior mapping performance in time, memory, and accuracy, and enables computationally efficient, safe navigation for high-speed UAVs and UGVs. The code will be released to foster community collaboration.
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