Experimental research of inflatable deployment dynamics of folded membrane booms
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摘要: 空间折叠薄膜管是空间充气展开结构的基本支撑部件, Z形折叠是充气展开管的基本折叠方式之一. 针对空间微重力环境, 建立了折叠薄膜管的充气展开实验系统, 采用气浮导轨, 解决了地面重力对充气展开过程的影响; 采用非接触式的光电测量方式, 有效地避免了接触式传感器对充气展开过程的干扰. 针对V形折叠薄膜管, 研究了不同的充气流量、薄膜管尺寸效应以及展开端有无有效载荷对充气展开动力学特性的影响; 通过实验研究, 选择充气流量、管子直径和载荷质量为主定参量, 对充气展开过程进行量纲分析和实验误差分析, 结果表明, 折叠薄膜管的充气展开最大速度与充气的体积流量成正比, 与管直径的立方成反比.
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关键词:
- 量纲分析
Abstract: Inflatable membrane boom used to deploy and support spacestructures is a key component for many space inflatable structures. Z-foldedtype is one kind of basic folded membrane booms. In this paper, an inflationdeployment experimental system in equivalent microgravity environment isestablished based on air track which resolves the effect of that gravitycaused friction. Non-contact photoelectricity measurement effectively avoidsthe disturbance of contact sensor to the inflation deployment process. Theeffects of different inflation flows, variant geometry dimensions andloading/unloading on deployable end on dynamic properties are researched.Inflation flow, diameter, and payload mass are chosen as main parameters inthe experiment. Inflation deployment process is analyzed by dimensiontheory, and analysis of experimental error is carried out. The experimentalresults indicate that the maximal deployment velocity of the folded booms isboth direct relation of gas flow and inverse relation of the boom cubicdiameter.-
Key words:
- dimension analysis
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