Purpose

In the post-capture stage, the tumbling target rotates the combined spacecraft system, and the detumbling operation performed by the space robot is required. To save the costly onboard fuel of the space robot, this paper aims to present a novel post-capture detumbling strategy.

Design/methodology/approach

Actuated by the joint rotations of the manipulator, the combined system is driven from three-axis tumbling state to uniaxial rotation about its maximum principal axis. Only unidirectional thrust perpendicular to the axis is needed to slow down the uniaxial rotation, thus saving the thruster fuel. The optimization problem of the collision-free detumbling trajectory of the space robot is described, and it is optimized by the particle swarm optimization algorithm.

Findings

The numerical simulation results show that along the trajectory planned by the detumbling strategy, the maneuver of the manipulator can precisely drive the combined system to rotate around its maximum principal axis, and the final kinetic energy of the combined system is smaller than the initial. The unidirectional thrust and the lower kinetic energy can ensure the fuel-saving in the subsequent detumbling stage.

Originality/value

This paper presents a post-capture detumbling strategy to drive the combined system from three-axis tumbling state to uniaxial rotation about its maximum principal axis by redistributing the angular momentum of the parts of the combined system. The strategy reduces the thrust torque for detumbling to effectively save the thruster fuel.

中文翻译：

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捕获后组合航天器的新型节油减滚策略

目的

在捕获后阶段，翻滚目标使组合航天器系统旋转，需要空间机器人进行翻滚操作。为了节省空间机器人昂贵的机载燃料，本文旨在提出一种新颖的捕获后防滚策略。

设计/方法论/途径

在机械臂关节旋转的驱动下，组合系统从三轴翻滚状态驱动到绕其最大主轴的单轴旋转。只需要垂直于轴线的单向推力即可减慢单轴旋转，从而节省推进器燃料。描述了空间机器人无碰撞滚转轨迹的优化问题，并采用粒子群优化算法进行优化。

发现

数值模拟结果表明，沿着退滚策略规划的轨迹，机械臂的机动能够精确地驱动组合系统绕其最大主轴旋转，且组合系统的最终动能小于初始动能。单向推力和较低的动能可以保证后续脱滚阶段的节油。

原创性/价值

本文提出了一种捕获后滚滚策略，通过重新分配组合系统各部分的角动量，将组合系统从三轴滚滚状态驱动到绕其最大主轴的单轴旋转。该策略降低了滚转推力扭矩，有效节省推进器燃料。