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arXiv 1801.00680cs.RO
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基于采样的分解任务和运动规划方法

Sampling-Based Methods for Factored Task and Motion Planning

csail.mit.edu(麻省理工学院计算机科学与人工智能实验室)

Caelan Reed Garrett, Tomás Lozano-Pérez, Leslie Pack Kaelbling

摘要:

本文提出了一个通用的制定一大类离散时间规划问题,与混合状态和控制空间,作为因子转换系统。分解允许将状态转换描述为多个约束的交集,每个约束影响状态和控制变量的子集。许多可移动物体的机器人操作问题涉及约束,这些约束一次只影响几个变量,因此表现出大量的因子分解。我们开发了一个理论框架,用于解决基于采样算法的因子转换系统。该框架的特点的解决方案所在的子流形上的条件,导致一个强大的可行性,结合降维约束的表征。然后,它将这些条件连接到相应的条件采样器,这些条件采样器可以被组合以产生该子流形上的值。我们提出了两个域独立的,概率完整的规划算法,作为输入,一组条件采样。我们证明了这些算法的经验效率上的一组具有挑战性的任务和运动规划问题,包括采摘,放置和推动。

英文摘要:

This paper presents a general-purpose formulation of a large class of discrete-time planning problems, with hybrid state and control-spaces, as factored transition systems. Factoring allows state transitions to be described as the intersection of several constraints each affecting a subset of the state and control variables. Robotic manipulation problems with many movable objects involve constraints that only affect several variables at a time and therefore exhibit large amounts of factoring. We develop a theoretical framework for solving factored transition systems with sampling-based algorithms. The framework characterizes conditions on the submanifold in which solutions lie, leading to a characterization of robust feasibility that incorporates dimensionality-reducing constraints. It then connects those conditions to corresponding conditional samplers that can be composed to produce values on this submanifold. We present two domain-independent, probabilistically complete planning algorithms that take, as input, a set of conditional samplers. We demonstrate the empirical efficiency of these algorithms on a set of challenging task and motion planning problems involving picking, placing, and pushing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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