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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。
The satellite dish deployment mechanism has a wide range of applications in the field of aerospace. The space size is large, the topological structure is complex, and the components are mostly hinged with each other. The satellite antenna requires high pointing accuracy. The effect of the hinge clearance on the pointing accuracy should be considered. Pointing precision analysis of satellite antenna deployment mechanism with hinge gap is complicated and difficult to solve. Therefore, a method of matrix modeling based on block modeling is proposed. The complex whole model is decomposed into the calculation model of locking mechanism and two single closed loops Mechanism calculation model, respectively, the impact of the calculation of hinge clearance on its accuracy, the establishment of the computer model and the use of particle swarm optimization algorithm to solve, get a particular configuration of the plate satellite antenna under extremely bad conditions to expand the pointing error 0.067 °. The research shows that the established computational model is of high precision and can be quickly obtained by the intelligent optimization algorithm pointing pointing accuracy of extreme value, providing a reference for the design of the error compensation mechanism.