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arXiv 2406.05613cs.RO
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用于减少物体操作中交互力矩的多个移动机械臂分布式运动控制

Distributed Motion Control of Multiple Mobile Manipulators for Reducing Interaction Wrench in Object Manipulation

Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology(香港科技大学机械及航空航天工程学系)

Wenhang Liu, Meng Ren, Kun Song, Gaoming Chen, Michael Yu Wang, Zhenhua Xiong

AI总结:

本文提出一种基于局部信息和关节速度控制的分布式运动控制方法,有效减少多移动机械臂协同操作中的交互力矩,具有收敛快、鲁棒性强且易于物理实现的优势。

摘要:

在现实世界的物体协同操作中,多个移动机械臂系统可能会受到干扰和异步的影响,导致过大的交互力矩,进而可能造成物体损坏或触发紧急停止。现有方法通常依赖于力矩控制和动力学模型,而这在许多工业机器人和设置中并不常见。此外,动力学模型通常忽略关节摩擦力且不够准确。这些方法在物理系统中难以实现和验证。为了解决这些问题,本文提出了一种新颖的分布式运动控制方法,旨在减少这些不必要的交互力矩。该控制律仅基于局部信息和关节速度控制,以增强实用性。考虑了分布式架构内的通信延迟。通过Lyapunov定理严格证明了控制律的稳定性。在仿真中展示了其有效性,并研究了通信图连通性和通信延迟的影响。与其他方法的比较显示了所提控制律在收敛速度和鲁棒性方面的优势。最后,该控制律已在物理实验中得到验证。它不需要动力学建模或力矩控制,因此对物理机器人更加用户友好。

英文摘要:

In real-world cooperative manipulation of objects, multiple mobile manipulator systems may suffer from disturbances and asynchrony, leading to excessive interaction wrenches and potentially causing object damage or emergency stops. Existing methods often rely on torque control and dynamic models, which are uncommon in many industrial robots and settings. Additionally, dynamic models often neglect joint friction forces and are not accurate. These methods are challenging to implement and validate in physical systems. To address the problems, this paper presents a novel distributed motion control approach aimed at reducing these unnecessary interaction wrenches. The control law is only based on local information and joint velocity control to enhance practical applicability. The communication delays within the distributed architecture are considered. The stability of the control law is rigorously proven by the Lyapunov theorem. In the simulations, the effectiveness is shown, and the impact of communication graph connectivity and communication delays has been studied. A comparison with other methods shows the advantages of the proposed control law in terms of convergence speed and robustness. Finally, the control law has been validated in physical experiments. It does not require dynamic modeling or torque control, and thus is more user-friendly for physical robots.

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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