Deployable Tensegrity Reè ectors for Small Satellites
Deployable Tensegrity Reè ectors for Small Satellites
复制标题
小型卫星的可部署张拉整体扇区
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
S. Pellegrino
中科院分区：
文献类型：
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作者：
S. Pellegrino
未来的小型卫星任务需要成本低、精度高、孔径大、能封装在小外壳内的自由矢量结构。现有的可折叠的自由元件形成了一个紧凑的包，虽然窄，但对于许多应用来说太高了。提出了另一种方法，由一个可展开的“张拉整体”棱镜组成，形成一个环形结构，该结构部署两个相同的电缆网（前网和后网），通过张拉带相互连接；侧网眼与前网眼相连。优化了结构的几何锥形，减小了张拉整体棱镜杆部的压缩。一个小规模的物理模型已经被构建来证明所提出的概念。提出了一种3米直径、10 ghz自由波导的初步设计，其焦长与直径比为0.4，可封装在0:1£0:2£0:8 m 3的包络内。命名=区域,2 m =管截面半径,m b =数量的酒吧D =孔径直径、m E =年轻' s模量,GN / m 2 F =焦距,m H =深度、m j =数量的关节L =三角形边长,米乐=有效长度,m m =数量的独立机制单位长度N =网张力,N / m近似球体的半径R = m R =回转半径,m s =数量的独立国家self-stress T =紧张,N±rms =表面均方根误差,Mmµ=网间相对旋转度，度Ω =密度，kg/m 3
Future small satellite missions require low-cost, precision ree ector structures with large aperture that can be packaged in a small envelope. Existing furlable ree ectors form a compact package which, although narrow, is too tall for many applications. An alternative approach is proposed, consisting of a deployable “ tensegrity” prism forming a ring structure that deploys two identical cable nets (front and rear nets ) interconnected by tension ties; the ree ecting mesh is attached to the front net. The geometric cone guration of the structure has been optimized to reduce the compression in the struts of the tensegrity prism. A small-scale physical model has been constructed to demonstrate the proposed concept. A preliminary design of a 3-m-diam, 10-GHz ree ector with a focal-length-todiameter ratio of 0.4 that can be packaged within an envelope of 0 :1 £ 0:2 ££ 0:8 m 3 is presented. Nomenclature A = area,m 2 a = radius of tube cross section, m b = number of bars D = aperture diameter, m E = Young’ s modulus, GN/m 2 F = focal length, m H = depth, m j = number of joints L = triangle side length, m Le = effective length, m m = number of independent mechanisms N = mesh tension per unit length, N/m R = radius of approximating sphere, m r = radius of gyration, m s = number of independent states of self-stress T = tension,N ±rms = root-mean-square surface error, mm µ = relative rotation between nets, deg Ω = density, kg/m 3