多面体网型空间抓捕机构的设计与分析

提出一种面向空间服务需求的新型多面体网型空间抓捕机构,以3-RRS并联机构为本体,将其动平台用空间单闭环六杆机构Bricard机构替代,通过Bricard网口的缩放运动和本体的包拢变形对空间目标进行抓捕以及位置和姿态的调整。通过在ADAMS软件中进行仿真来验证其抓捕过程,并以仿真所得关节受力情况为基础,在ANSYS软件和I-DEAS软件中进行仿真分析,对所提出的多面体网型空间抓捕机构进行强度分析与热平衡分析的工作,确保其机械结构强度和对热环境的适应性能够满足实际使用的需求。理论分析和仿真试验结果表明:该机构可满足空间目标抓捕任务的需求。

Design and Analysis of Polyhedral Net Space Capture Mechanism

A novel polyhedral net space capture mechanism for space service is proposed in the paper. The capture mechanism consists of a 3-RRS parallel mechanism (a spatial mechanism with 3-DOF) as the main body and a Bricard linkage (a spatial single closed-loop six-bar mechanism with 1-DOF) as the moving platform. Through the folding motion of the Bricard linkage and the shrinking motion of the main body, the mechanism can capture the target in space and adjust its position and posture. The capture process is verified by the simulation in ADAMS. Based on the joint stress from the simulation, the strength analysis and thermal balance analysis of the proposed polyhedral net space capture mechanism are conducted in ANSYS and I-DEAS, which ensure the mechanical strength and thermal adaptability of the mechanism can meet the requirements of actual application. It is shown by the results of theoretical analysis and simulation experiment that the mechanism can meet the requirement of space target capture tasks.