視界の限界を超えて：予期せぬ障害物に対するDRLベースのナビゲーション戦略
Beyond Visibility Limits: A DRL-Based Navigation Strategy for Unexpected Obstacles
LiDARデータの変化率を動的な環境知覚要素として活用し、カリキュラム学習で効率と安全性のバランスを取る深層強化学習ナビゲーション手法を提案。見通しの悪い環境での衝突を減らし、BARNデータセットで高い成功率を達成した。
著者: Mingao Tan, Shanze Wang, Biao Huang, Zhibo Yang, Rongfei Chen, Xiaoyu Shen, Wei Zhang
分類: cs.RO
原文アブストラクト
Distance-based reward mechanisms in deep reinforcement learning (DRL) navigation systems suffer from critical safety limitations in dynamic environments, frequently resulting in collisions when visibility is restricted. We propose DRL-NSUO, a novel navigation strategy for unexpected obstacles that leverages the rate of change in LiDAR data as a dynamic environmental perception element. Our approach incorporates a composite reward function with environmental change rate constraints and dynamically adjusted weights through curriculum learning, enabling robots to autonomously balance between path efficiency and safety maximization. We enhance sensitivity to nearby obstacles by implementing short-range feature preprocessing of LiDAR data. Experimental results demonstrate that this method significantly improves both robot and pedestrian safety in complex scenarios compared to traditional DRL-based methods. When evaluated on the BARN navigation dataset, our method achieved superior performance with success rates of 94.0% at 0.5 m/s and 91.0% at 1.0 m/s, outperforming conservative obstacle expansion strategies. These results validate DRL-NSUO's enhanced practicality and safety for human-robot collaborative environments, including intelligent logistics applications.
