论文标题
通过运动动力学计划和动态规划范围的基于重排的操作
Rearrangement-Based Manipulation via Kinodynamic Planning and Dynamic Planning Horizons
论文作者
论文摘要
混乱环境中的机器人操纵通常需要多个对象的复杂和顺序重排，以实现目标对象的所需重新配置。由于在这种情况下涉及复杂的物理互动，基于重排的操作仍然仅限于少量任务，并且尤其容易受到物理上的不确定性和感知噪声的影响。本文提出了一个计划框架，该框架利用了基于抽样的计划方法的效率，并通过动态控制计划范围来关闭操作循环。我们的方法交织了计划和执行，以逐步实现操纵目标，同时纠正整个过程中的任何错误或路径偏差。同时，我们的框架可以定义操纵目标，而无需明确的目标配置，从而使机器人能够灵活地与所有对象进行交互以促进对目标的操纵。通过在模拟和真实机器人中进行广泛的实验，我们在混乱的环境中评估了三个操纵任务的框架：抓握，重新安置和分类。与两种基线方法相比，我们表明我们的框架可以显着提高计划效率，对身体不确定性的鲁棒性以及在有限时间预算下的任务成功率。
Robot manipulation in cluttered environments often requires complex and sequential rearrangement of multiple objects in order to achieve the desired reconfiguration of the target objects. Due to the sophisticated physical interactions involved in such scenarios, rearrangement-based manipulation is still limited to a small range of tasks and is especially vulnerable to physical uncertainties and perception noise. This paper presents a planning framework that leverages the efficiency of sampling-based planning approaches, and closes the manipulation loop by dynamically controlling the planning horizon. Our approach interleaves planning and execution to progressively approach the manipulation goal while correcting any errors or path deviations along the process. Meanwhile, our framework allows the definition of manipulation goals without requiring explicit goal configurations, enabling the robot to flexibly interact with all objects to facilitate the manipulation of the target ones. With extensive experiments both in simulation and on a real robot, we evaluate our framework on three manipulation tasks in cluttered environments: grasping, relocating, and sorting. In comparison with two baseline approaches, we show that our framework can significantly improve planning efficiency, robustness against physical uncertainties, and task success rate under limited time budgets.
