无需全局状态,用单帧激光数据实时避障,让无人机与地面车协作更安全。
Global-State-Free Obstacle Avoidance for Quadrotor Control in Air-Ground Cooperation
- 仅用单帧激光数据生成速度调制矩阵,直接控制无人机避障。
- 每迭代耗时小于5毫秒,实现实时避障且不依赖环境预测。
- 适合动态未知环境,特别适用于无地图或特征少的复杂场景。
CoNi-MPC 为无人机在空地协同任务中提供了高效控制框架,完全依赖相对状态,无需全局状态估计。然而,其缺乏环境信息导致避障困难。为此,我们提出一种新型避障算法 CoNi-OA,专为无人机-无人车协同场景设计,不依赖全局状态或障碍物预测。CoNi-OA 利用无人机单帧原始激光雷达数据生成调制矩阵,直接调节四旋翼速度实现避障。该调制方法可在无人车非惯性坐标系中实时生成无碰撞轨迹,显著降低计算开销(每次迭代低于5毫秒),同时在动态不可预测环境中保持安全性。主要贡献包括:(1) 面向非惯性系下无全局状态的空地协同避障算法;(2) 仅基于单帧激光数据实现快速实时轨迹生成,无需障碍物建模或预测;(3) 可适应静态与动态环境,扩展至无特征或未知场景。
原文摘要 · Abstract (English)
CoNi-MPC provides an efficient framework for UAV control in air-ground cooperative tasks by relying exclusively on relative states, eliminating the need for global state estimation. However, its lack of environmental information poses significant challenges for obstacle avoidance. To address this issue, we propose a novel obstacle avoidance algorithm, Cooperative Non-inertial frame-based Obstacle Avoidance (CoNi-OA), designed explicitly for UAV-UGV cooperative scenarios without reliance on global state estimation or obstacle prediction. CoNi-OA uniquely utilizes a single frame of raw LiDAR data from the UAV to generate a modulation matrix, which directly adjusts the quadrotor's velocity to achieve obstacle avoidance. This modulation-based method enables real-time generation of collision-free trajectories within the UGV's non-inertial frame, significantly reducing computational demands (less than 5 ms per iteration) while maintaining safety in dynamic and unpredictable environments. The key contributions of this work include: (1) a modulation-based obstacle avoidance algorithm specifically tailored for UAV-UGV cooperation in non-inertial frames without global states; (2) rapid, real-time trajectory generation based solely on single-frame LiDAR data, removing the need for obstacle modeling or prediction; and (3) adaptability to both static and dynamic environments, thus extending applicability to featureless or unknown scenarios.
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