arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2207.02464cs.ROcs.AIcs.SYeess.SY
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面向非合作对象的漂浮基双臂空间机械臂运动规划学习系统

A Learning System for Motion Planning of Free-Float Dual-Arm Space Manipulator towards Non-Cooperative Object

Tsinghua University(清华大学);Beijing Institute of Control Engineering(北京控制工程研究所);City University of Hong Kong(香港城市大学)

Shengjie Wang, Yuxue Cao, Xiang Zheng, Tao Zhang

摘要:

近年来,出现了一些不合作的空间物体,如失败的卫星和太空垃圾。这些物体通常由自由浮动双臂空间机械臂操作或收集。强化学习(RL)方法由于消除了建模和参数手动调整的困难,在空间机械臂轨迹规划中显示出更有前途的迹象。虽然以前的研究证明了它们的有效性,但它们不能应用于跟踪具有未知旋转的动态目标(非合作目标)。提出了一种自由漂浮双臂空间机械臂(FFDASM)面向非合作对象的运动规划学习系统。具体来说,我们的方法由两个模块组成。模块一实现了大目标空间内两个末端执行器的多目标轨迹规划。然后,模块II以非合作目标的点云作为输入,估计目标的运动特性,进而预测目标点在非合作目标上的位置。利用模块I和模块II的组合,成功地跟踪了具有未知规律的旋转物体上的目标点。此外,实验还证明了我们的学习系统的可扩展性和泛化能力。

英文摘要:

Recent years have seen the emergence of non-cooperative objects in space, like failed satellites and space junk. These objects are usually operated or collected by free-float dual-arm space manipulators. Thanks to eliminating the difficulties of modeling and manual parameter-tuning, reinforcement learning (RL) methods have shown a more promising sign in the trajectory planning of space manipulators. Although previous studies demonstrate their effectiveness, they cannot be applied in tracking dynamic targets with unknown rotation (non-cooperative objects). In this paper, we proposed a learning system for motion planning of free-float dual-arm space manipulator (FFDASM) towards non-cooperative objects. Specifically, our method consists of two modules. Module I realizes the multi-target trajectory planning for two end-effectors within a large target space. Next, Module II takes as input the point clouds of the non-cooperative object to estimate the motional property, and then can predict the position of target points on an non-cooperative object. We leveraged the combination of Module I and Module II to track target points on a spinning object with unknown regularity successfully. Furthermore, the experiments also demonstrate the scalability and generalization of our learning system.

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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