液压定位器在航天器吊装中的应用分析

摘要

Hoisting is one of the most important processes in assembly of spacecraft. Hydraulic positioner is able to control the assembly procession of spacecraft. Because the size of Chinese spacecraft gets larg-er ,and the weight gets heavier ,the requirements of stability and safety in hoisting process are becoming more strict. Basing on the assembly process of spacecraft ,this paper put forward a calculation model of im-pact acceleration for spacecraft assembly. One spacecraft is taken for example ,which simulation model is built. The drop impacts of spacecraft from different heights are simulated by ADAMS software. The acceler-ating curve of the drop impacts is achieved ,which shows that higher precision of height controlling in hoisting is better for the safety of spacecraft. The result of this paper has practical value for spacecraft hoisting.%吊装作业是航天器总装过程中重要的工况之一,液压定位器能够控制吊装精度.随着我国航天器尺寸、重量的不断增大,对吊装精度提出了更高的要求.在分析航天器吊装工艺的基础上,提出了航天器吊装对接中的碰撞力计算模型.通过动力学仿真软件ADAMS,分析了不同下落距离下航天器的对接碰撞过程,得到了航天器对接碰撞的冲击加速度变化曲线.以某航天器舱体吊装为例,仿真分析了在不同精度下舱体对接过程中碰撞产生的最大加速度.计算结果表明随着定位精度提高,航天器对接中产生的最大加速度线性下降,能够确保航天器吊装过程中的安全.