含铰链间隙板式卫星天线展开精度分析

发布时间：2018-03-11 01:09

本文选题：可展开机构　切入点：误差分析　出处：《北京航空航天大学学报》2016年12期 　论文类型：期刊论文

【摘要】：板式卫星天线展开机构在航天领域有着广泛的应用,其空间尺寸大,拓扑结构复杂,构件之间多用铰链联结,卫星天线对指向精度要求较高,应考虑铰链间隙对指向精度的影响。含铰链间隙的卫星天线展开机构的指向精度分析建模复杂、求解困难,为此提出了矩阵法分块建模的分析方法,将复杂的整机模型分解成锁定机构计算模型与2个单闭环机构计算模型,分别分析计算铰链间隙对其精度造成的影响,建立整机的计算模型并采用粒子群优化算法进行求解,得到某特定构型的板式卫星天线在极恶劣工况下展开的指向误差为0.067°。研究表明,建立的计算模型精度高,通过智能优化算法求解可以快速得到卫星可展开机构的指向精度极恶劣值,为展开机构的误差补偿设计提供参考。
[Abstract]:The development mechanism of plate satellite antenna has been widely used in spaceflight field. The space size is large, the topological structure is complex, and there are many hinged connections between the components, so the pointing precision of satellite antenna is very high. The influence of hinge clearance on pointing accuracy should be considered. The analysis and modeling of pointing accuracy of satellite antenna unfolded mechanism with hinge clearance is complicated and difficult to solve. The complex machine model is decomposed into two models of lock mechanism and two single closed loop mechanism. The influence of hinge clearance on its precision is analyzed, and the calculation model of the whole machine is established and solved by particle swarm optimization (PSO). The result shows that the pointing error of a certain plate satellite antenna is 0.067 掳under very bad working conditions. The results show that the accuracy of the proposed model is high. Through the intelligent optimization algorithm, the pointing accuracy of the satellite deployable mechanism can be obtained quickly, which provides a reference for the error compensation design of the deployable mechanism.
【作者单位】：北京航空航天大学机械工程及自动化学院;北京航空航天大学虚拟现实技术与系统国家重点实验室;
【分类号】：V443.4

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