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arXiv 1809.00367cs.ROcs.SYeess.SY
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基于动量模型的太空机器人最小参数识别

Momentum Model-based Minimal Parameter Identification of a Space Robot

Indian Institute of Technology, Jodhpur, Rajasthan, India(印度理工学院,朱达普尔,拉贾斯坦邦,印度);McGill University, Montreal, Quebec H3A 0C3, Canada(麦吉尔大学,蒙特利尔,魁北克 H3A 0C3,加拿大)

B. Naveen, Suril V. Shah, Arun K. Misra

AI总结:

本文提出了一种基于动量模型的最小参数识别方法,用于在轨识别太空机器人的最小参数,这些参数能够唯一确定动量和动力学模型,从而支持卫星及其安装的机械臂的运动规划和控制。

摘要:

准确的惯性参数信息对空间机器人的运动规划和控制至关重要。在发射前,仅能通过实验和计算机辅助设计(CAD)模型获得惯性参数的粗略估计。在发射后,轨道操作会显著改变惯性参数的值。本文提出了一种新的基于动量模型的方法,在轨识别太空机器人的最小参数。最小参数是链接的惯性参数的组合,并唯一定义动量和动力学模型。因此,它们对于卫星及其安装的机械臂的运动规划和控制是足够的。所提出框架的关键在于将动量模型以最小参数的线性形式进行唯一建模。进一步,为了估计最小参数,我们提出了一种基于关节速度方向组合的新型关节轨迹规划和优化技术。该识别框架的有效性在具有12个自由度的空间双臂机器人上得到验证。该方法适用于树型空间机器人,仅需要姿态和扭转数据,并且随着关节数量的增加而可扩展。

英文摘要:

Accurate information of inertial parameters is critical to motion planning and control of space robots. Before the launch, only a rudimentary estimate of the inertial parameters is available from experiments and computer-aided design (CAD) models. After the launch, on-orbit operations substantially alter the value of inertial parameters. In this work, we propose a new momentum model-based method for identifying the minimal parameters of a space robot while on orbit. Minimal parameters are combinations of the inertial parameters of the links and uniquely define the momentum and dynamic models. Consequently, they are sufficient for motion planning and control of both the satellite and robotic arms mounted on it. The key to the proposed framework is the unique formulation of momentum model in the linear form of minimal parameters. Further, to estimate the minimal parameters, we propose a novel joint trajectory planning and optimization technique based on direction combinations of joints' velocity. The efficacy of the identification framework is demonstrated on a 12 degrees-of-freedom, spatial, dual-arm space robot. The methodology is developed for tree-type space robots, requires just the pose and twist data, and scalable with increasing number of joints.

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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