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arXiv 1707.01696cs.RO
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广义任务参数化技能学习

Generalized Task-Parameterized Skill Learning

Istituto Italiano di Tecnologia(意大利理工学院)

Yanlong Huang, João Silvério, Leonel Rozo, Darwin G. Caldwell

摘要:

演示编程最近受到了广泛的关注,因为它以用户友好和自然的方式将人类技能转移到机器人身上。为了促进多个演示的学习,同时推广到新的情况下,任务参数化高斯混合模型(TP-GMM)最近已被开发。该模型在人机协作和双臂操作等领域取得了可靠的性能。然而,这个学习框架中的关键任务框架和相关参数通常是由人类教师设置的,这使得三个问题尚未得到解决:(i)平等地对待任务帧,而不考虑它们各自的重要性,(ii)定义任务参数而不考虑附加的任务约束,例如机器人关节限制和运动平滑度,以及(iii)预定义固定数量的任务帧,而不管它们中的一些是否可能是冗余的或者甚至与手头的任务无关。在本文中,我们推广的任务参数化学习解决上述问题。此外,我们提供了一个新的学习视角,允许机器人在低维空间中改进和适应以前学到的技能。在模拟和真实的机器人系统中研究了几个例子,显示了我们的方法的适用性。

英文摘要:

Programming by demonstration has recently gained much attention due to its user-friendly and natural way to transfer human skills to robots. In order to facilitate the learning of multiple demonstrations and meanwhile generalize to new situations, a task-parameterized Gaussian mixture model (TP-GMM) has been recently developed. This model has achieved reliable performance in areas such as human-robot collaboration and dual-arm manipulation. However, the crucial task frames and associated parameters in this learning framework are often set by the human teacher, which renders three problems that have not been addressed yet: (i) task frames are treated equally, without considering their individual importance, (ii) task parameters are defined without taking into account additional task constraints, such as robot joint limits and motion smoothness, and (iii) a fixed number of task frames are pre-defined regardless of whether some of them may be redundant or even irrelevant for the task at hand. In this paper, we generalize the task-parameterized learning by addressing the aforementioned problems. Moreover, we provide a novel learning perspective which allows the robot to refine and adapt previously learned skills in a low dimensional space. Several examples are studied in both simulated and real robotic systems, showing the applicability of our approach.

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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