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arXiv 2404.00514cs.RO
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基于扰动感知MPC与位姿优化的人机协同搬运

Human-Robot Co-Transportation using Disturbance-Aware MPC with Pose Optimization

George Mason University(乔治·玛森大学);University of Tennessee, Knoxville(田纳西大学,诺克斯维尔)

Al Jaber Mahmud, Amir Hossain Raj, Duc M. Nguyen, Weizi Li, Xuesu Xiao, Xuan Wang

AI总结:

本文提出一种融合扰动感知DARE与位姿优化的MPC算法,用于人机协同搬运,通过两步迭代选择最优机械臂位姿并计算全身控制输入,在仿真和Fetch机器人实验中优于基线方法。

摘要:

本文提出了一种新的控制算法,用于人机协同搬运任务,该任务使用配备移动底座和机械臂的机器人操作器。我们将常规模型预测控制(MPC)与一种新颖的位姿优化机制相结合,以更有效地缓解任务期间的扰动(例如人类行为不确定性或机器人执行噪声)。我们方法的核心涉及一个两步迭代设计:在每个规划时域内,我们从候选集合中确定机械臂的最优位姿(关节角度配置),旨在实现最低的估计控制成本。该选择基于求解扰动感知的离散代数黎卡提方程(DARE),该方程同时确定机器人全身控制(包括移动底座和机械臂)的最优输入。为验证所提方法的有效性,我们提供了扰动感知DARE的理论推导,并使用Fetch机器人在不同条件下进行了仿真实验和硬件演示,包括不同轨迹和不同扰动水平。结果表明,我们所提出的方法优于基线算法。

英文摘要:

This paper proposes a new control algorithm for human-robot co-transportation using a robot manipulator equipped with a mobile base and a robotic arm. We integrate the regular Model Predictive Control (MPC) with a novel pose optimization mechanism to more efficiently mitigate disturbances (such as human behavioral uncertainties or robot actuation noise) during the task. The core of our methodology involves a two-step iterative design: At each planning horizon, we determine the optimal pose of the robotic arm (joint angle configuration) from a candidate set, aiming to achieve the lowest estimated control cost. This selection is based on solving a disturbance-aware Discrete Algebraic Ricatti Equation (DARE), which also determines the optimal inputs for the robot's whole body control (including both the mobile base and the robotic arm). To validate the effectiveness of the proposed approach, we provide theoretical derivation for the disturbance-aware DARE and perform simulated experiments and hardware demos using a Fetch robot under varying conditions, including different trajectories and different levels of disturbances. The results reveal that our proposed approach outperforms baseline algorithms.

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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