Volume 3 Issue 3
Jul.  2010
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LIU Xiu-min, HE Bin, SHA Wei, ZHANG Xing-xiang, SUN Bin, REN Jian-yue. Topological lightweight design of primary mirror in space camera[J]. Chinese Optics, 2010, 3(3): 239-244.
Citation: LIU Xiu-min, HE Bin, SHA Wei, ZHANG Xing-xiang, SUN Bin, REN Jian-yue. Topological lightweight design of primary mirror in space camera[J]. Chinese Optics, 2010, 3(3): 239-244.

Topological lightweight design of primary mirror in space camera

  • Received Date: 22 Jan 2010
  • Publish Date: 30 Jun 2010
  • In order to satisfy the strict requirements of the surface-shapes and lightweight ratios for space mirrors, the topological method was introduced to design the reflect mirror with a Ф 700 mm. According to the density method, the Solid Isotropic Microstructure with Penalization(SIMP) model was established. In the condition of axial-oriented gravity, by taking the general flexibility as a design constraint, and the minimum volume as a design objective, a better structure with a RMS of 8.89 nm and a lightweight ratio of 82% was obtained after iterations. In the same weight, the conventional triangular lightweight structure shows its RMS in 11.75 nm and lightweight ratio in 65%. In the condition of radial-oriented gravity, the surface-shape of the topological structure also meets the requirements of the design. In the considerations of the surface-shape and lightweight ratio, the computational result shows that the topological optimization method is better than the conventional method.

     

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