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arXiv 2012.06023cs.ROcs.AIcs.LG
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用于高维运动规划的Cost-to-Go函数生成网络

Cost-to-Go Function Generating Networks for High Dimensional Motion Planning

Samsung AI Center NY(三星纽约人工智能中心)

Jinwook Huh, Volkan Isler, Daniel D. Lee

摘要:

本文提出了c2 g-HOF网络,学习产生成本去功能的机械手运动规划。c2 g-HOF架构由表示为神经网络(c2 g-网络)的配置空间上的进行成本(cost-to-go)函数以及输出针对给定输入工作空间的c2 g-网络的权重的高阶函数(HOF)网络组成。这两个网络都是使用传统运动规划器计算的成本以监督方式进行端到端训练的。经过训练后,c2 g-HOF可以直接从工作空间传感器输入(表示为3D点云或2D图像)生成平滑连续的成本函数。在推理时,c2 g网络的权重被非常有效地计算,并且通过简单地遵循cost-to-go函数的梯度来生成接近最优的轨迹。我们比较c2 g-HOF与传统的规划算法的各种机器人和规划方案。实验结果表明,规划与c2 g-HOF是显着快于其他运动规划算法,导致数量级的改善时,包括碰撞检查。此外,尽管从配置空间中的稀疏采样轨迹进行训练,c2 g-HOF仍能生成更平滑且通常成本更低的轨迹。我们展示了基于7自由度机械臂的规划成本,其中复杂工作空间中的运动规划整个轨迹仅需0.13秒。

英文摘要:

This paper presents c2g-HOF networks which learn to generate cost-to-go functions for manipulator motion planning. The c2g-HOF architecture consists of a cost-to-go function over the configuration space represented as a neural network (c2g-network) as well as a Higher Order Function (HOF) network which outputs the weights of the c2g-network for a given input workspace. Both networks are trained end-to-end in a supervised fashion using costs computed from traditional motion planners. Once trained, c2g-HOF can generate a smooth and continuous cost-to-go function directly from workspace sensor inputs (represented as a point cloud in 3D or an image in 2D). At inference time, the weights of the c2g-network are computed very efficiently and near-optimal trajectories are generated by simply following the gradient of the cost-to-go function. We compare c2g-HOF with traditional planning algorithms for various robots and planning scenarios. The experimental results indicate that planning with c2g-HOF is significantly faster than other motion planning algorithms, resulting in orders of magnitude improvement when including collision checking. Furthermore, despite being trained from sparsely sampled trajectories in configuration space, c2g-HOF generalizes to generate smoother, and often lower cost, trajectories. We demonstrate cost-to-go based planning on a 7 DoF manipulator arm where motion planning in a complex workspace requires only 0.13 seconds for the entire trajectory.

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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