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1.沈阳建筑大学 机械工程学院,辽宁 沈阳 110168
2.沈阳建筑大学 土木工程学院,辽宁 沈阳 110168
3.哈尔滨工业大学 机器人技术与系统国家重点实验室,黑龙江 哈尔滨 150001
Received:20 April 2021,
Revised:08 July 2021,
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田大可,范小东,金路等.六棱柱模块化可展开天线形面精度分析[J].光学精密工程,
TIAN Da-ke,FAN Xiao-dong,JIN Lu,et al.Surface accuracy analysis for hexagonal prism modular deployable antenna[J].Optics and Precision Engineering,
田大可,范小东,金路等.六棱柱模块化可展开天线形面精度分析[J].光学精密工程, DOI:10.37188/OPE.XXXXXXXX.0001
TIAN Da-ke,FAN Xiao-dong,JIN Lu,et al.Surface accuracy analysis for hexagonal prism modular deployable antenna[J].Optics and Precision Engineering, DOI:10.37188/OPE.XXXXXXXX.0001
针对空间可展开天线大型化、模块化、高精度化发展趋势,提出一种六棱柱模块化空间可展开天线支撑结构形面精度分析模型。阐述了六棱柱模块化空间可展开天线的结构组成,分析了六棱柱模块化结构的拓扑规律。基于等包络圆思想及机器人学基本理论,提出了点面法和两点法2种包络圆数学建模方法,并由此建立了等包络圆交点数学模型及肋单元夹角数学模型,进而构建了用于六棱柱模块化可展开天线支撑结构形面精度分析的数学模型。最后,采用数值仿真与试验验证相结合的方式对建立的模型进行了验证。仿真及试验结果表明:包络圆能紧密地贴合在球面上,与球面吻合良好;数值仿真模型状态下,六棱柱模块间实现了准确连接;试验中特征点的绝对误差主要分布在5~10 mm,相对误差主要集中在0.05%~0.1%,肋单元夹角绝对误差多分布在0.05°~0.1°之间,表明测量值和理论值间偏差较小、吻合较好。所提出的形面精度分析模型能够求解出所有模块连接点的空间坐标,为超多模块可展开天线形面精度的分析及研究提供了理论基础。
A surface accuracy analysis model for hexagonal prism modular deployable antenna support structure is proposed in view of the large-scale, modular and high-precision development trend of deployable antenna. The structure composition of hexagonal modular deployable antenna is elaborated and the topological rules of hexagonal modular structure are analyzed. Based on the idea of equal envelope circles and the basic theory of robotics, two mathematical modeling methods of envelope circle, point-surface method and two-point method, are proposed, from which the mathematical model of equal envelope circle intersection point and the mathematical model of included angle of rib unit are established, and the mathematical model for accuracy analysis of shape surface of modular deployable antenna support structure with hexagonal prism is built. Finally, the model is verified by the combination of numerical simulation and experimental verification. The simulation and experimental results show that the enveloping circle can fit on the spherical surface closely, and it is in good agreement with the spherical surface; In the state of numerical simulation model, the hexagonal prism modules are connected accurately; In the experiment, the absolute error of feature points is mainly distributed in 5
-
10 mm, the relative error is mainly concentrated in 0.05%
-
0.1%, and the absolute error of rib unit angle is mostly distributed in 0.05°
~
0.1°. It shows that the deviation between the measured value and the theoretical value is small and the agreement is good. The proposed model can solve the spatial coordinates of all module connection points, which provides a theoretical basis for the analysis and research of the shape accuracy of multi module deployable antenna.
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