arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2204.03038cs.ROcs.SYeess.SY
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基于Jerk安全集算法的工业机器人安全交互

Safe Interactive Industrial Robots using Jerk-based Safe Set Algorithm

Carnegie Mellon University(卡内基梅隆大学)

Ruixuan Liu, Rui Chen, Changliu Liu

摘要:

提高生产线灵活性的需求要求机器人与人类工人合作。然而,现有的交互式工业机器人只能保证本质安全(减少碰撞冲击),而不能保证交互安全(避免碰撞),这大大限制了它们的灵活性。该问题源于现有工业机器人控制软件的两个局限性:1)缺乏对实时轨迹修改的支持; 2)缺乏在机器人动力学约束下具有保证碰撞避免的智能安全控制算法。为了解决第一个问题,以前开发了一个急动有界的位置控制器(JPC)。本文讨论了第二个限制,在JPC之上。具体来说,我们引入了一个基于急动的安全集算法(JSSA),以确保避免碰撞,同时考虑机器人的动力学约束。JSSA极大地扩展了原安全集算法的范围,该算法仅适用于具有无界加速度的二阶系统。JSSA在FANUC LR Mate 200 id/7 L机器人上实现,并通过HRI任务进行了验证。实验表明,JSSA可以始终保持机器人在一个安全的距离,同时执行指定的任务。

英文摘要:

The need to increase the flexibility of production lines is calling for robots to collaborate with human workers. However, existing interactive industrial robots only guarantee intrinsic safety (reduce collision impact), but not interactive safety (collision avoidance), which greatly limited their flexibility. The issue arises from two limitations in existing control software for industrial robots: 1) lack of support for real-time trajectory modification; 2) lack of intelligent safe control algorithms with guaranteed collision avoidance under robot dynamics constraints. To address the first issue, a jerk-bounded position controller (JPC) was developed previously. This paper addresses the second limitation, on top of the JPC. Specifically, we introduce a jerk-based safe set algorithm (JSSA) to ensure collision avoidance while considering the robot dynamics constraints. The JSSA greatly extends the scope of the original safe set algorithm, which has only been applied for second-order systems with unbounded accelerations. The JSSA is implemented on the FANUC LR Mate 200id/7L robot and validated with HRI tasks. Experiments show that the JSSA can consistently keep the robot at a safe distance from the human while executing the designated task.

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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