用真人操作数据训练机器人,让其在室内自主导航更灵活。
Are Learning-Based Approaches Ready for Real-World Indoor Navigation? A Case for Imitation Learning
- 用遥控器示范数据教机器人学导航,直接从图像和激光雷达中学习。
- 多模态模型在多数场景表现优于传统方法,但在动态环境差。
- 适合想快速部署导航系统的研究者或工程师参考。
传统室内导航方法在受限场景下可靠,但复杂环境下缺乏灵活性或需人工调参。学习型方法直接从传感器数据和环境交互中学习,适应性更强。尽管已有大量学习导航策略的研究,但很少与传统方法直接对比,影响其在通用场景中的采纳。本文探索模仿学习(IL)在室内导航中的可行性,使用专家(遥控器)示范数据,训练基于RGB图像、激光雷达及两者结合的导航策略网络,并与基于势场的传统方法进行比较。实验在配备2D激光雷达和摄像头的实体移动机器人平台上,于大学室内环境中进行。多模态模型在多数场景下表现更优,但在动态环境中表现不佳,可能源于示范数据多样性不足。然而,其能直接从数据学习并在不同布局间泛化的能力表明,模仿学习可作为实际导航方案,也可能是后续终身学习的良好初始化策略。
原文摘要 · Abstract (English)
Traditional indoor robot navigation methods provide a reliable solution when adapted to constrained scenarios, but lack flexibility or require manual re-tuning when deployed in more complex settings. In contrast, learning-based approaches learn directly from sensor data and environmental interactions, enabling easier adaptability. While significant work has been presented in the context of learning navigation policies, learning-based methods are rarely compared to traditional navigation methods directly, which is a problem for their ultimate acceptance in general navigation contexts. In this work, we explore the viability of imitation learning (IL) for indoor navigation, using expert (joystick) demonstrations to train various navigation policy networks based on RGB images, LiDAR, and a combination of both, and we compare our IL approach to a traditional potential field-based navigation method. We evaluate the approach on a physical mobile robot platform equipped with a 2D LiDAR and a camera in an indoor university environment. Our multimodal model demonstrates superior navigation capabilities in most scenarios, but faces challenges in dynamic environments, likely due to limited diversity in the demonstrations. Nevertheless, the ability to learn directly from data and generalise across layouts suggests that IL can be a practical navigation approach, and potentially a useful initialisation strategy for subsequent lifelong learning.
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