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arXiv 2103.07938cs.ROcs.AI
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从示例任务执行中学习针插入

Learning needle insertion from sample task executions

University of Lincoln(林肯大学)

Amir Ghalamzan-E

摘要:

自动化机器人任务,例如,机器人的机器人识别可能非常复杂和耗时。学习一个任务模型来自主执行任务是非常宝贵的,这使得机器人手术技术能够为更广泛的社区所用。机器人手术的数据可以很容易地记录,其中收集的数据可以用于学习任务模型。这将减少机器人手术的时间和成本,其中外科医生可以监督机器人操作或给出高级命令,而不是对工具的低级控制。我们提供了一个在软组织中使用两个臂进行针插入的数据集,其中第1臂将针插入组织中,第2臂主动操纵软组织,以确保期望的和实际的退出点相同。这在实际手术中很重要,因为没有主动操纵组织的缝合可能会导致缝合失败,因为缝合可能无法抓住足够的组织来抵抗施加在缝合上的力。我们提出了一个针插入数据集,包括60个成功的试验记录的3对立体相机。此外,我们从演示中提出了深度机器人学习,它通过查看过去时间步的视频来预测机器人在t之后的时间步的期望状态(在t处采取的最佳动作产生),即任务执行的n步时间历史,其中N是内存时间窗口。实验结果表明,我们提出的深度模型架构优于现有的方法。虽然该解决方案还没有准备好部署在一个真正的机器人,结果表明,未来的发展,真正的机器人部署的可能性。

英文摘要:

Automating a robotic task, e.g., robotic suturing can be very complex and time-consuming. Learning a task model to autonomously perform the task is invaluable making the technology, robotic surgery, accessible for a wider community. The data of robotic surgery can be easily logged where the collected data can be used to learn task models. This will result in reduced time and cost of robotic surgery in which a surgeon can supervise the robot operation or give high-level commands instead of low-level control of the tools. We present a data-set of needle insertion in soft tissue with two arms where Arm 1 inserts the needle into the tissue and Arm 2 actively manipulate the soft tissue to ensure the desired and actual exit points are the same. This is important in real-surgery because suturing without active manipulation of tissue may yield failure of the suturing as the stitch may not grip enough tissue to resist the force applied for the suturing. We present a needle insertion dataset including 60 successful trials recorded by 3 pair of stereo cameras. Moreover, we present Deep-robot Learning from Demonstrations that predicts the desired state of the robot at the time step after t (which the optimal action taken at t yields) by looking at the video of the past time steps, i.e. n step time history where N is the memory time window, of the task execution. The experimental results illustrate our proposed deep model architecture is outperforming the existing methods. Although the solution is not yet ready to be deployed on a real robot, the results indicate the possibility of future development for real robot deployment.

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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