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18 November 2014 Application substructure model synthesis method on modeling of a space camera
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Space infrared sensor must be assembled on a small satellite platform, so its whole mass and structure dimensions are strictly restricted by the satellite platform. The mechanical structure must be compacted, light, handy and reliable. Task of space infrared sensor structure system is to integrate each parts of system and provide a stable and reliable work platform for the whole body. The transfer functions of flexible object and base are analyzed by using mechanical impedance method and compared with stiffness models. It indicates that space infrared sensor must be considered the flexible body influence for transfer function on some certain conditions. Using second order Krylov method expresses multi-DOF flexible substructure, which combines with modal synthesis method to model and analyze two substructures connecting with springs and dampers. Compared with direct FEM arithmetic, it can improve the calculation efficiency and handle variable-rate stiffness and damping model or complex stiffness model of flexible connection, which is cannot do for common commercial FEM software.
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De-wei Sun, Tianjin Tang, Yong-jian Wu, and Jia-wen Yang "Application substructure model synthesis method on modeling of a space camera", Proc. SPIE 9298, International Symposium on Optoelectronic Technology and Application 2014: Imaging Spectroscopy; and Telescopes and Large Optics, 92981D (18 November 2014);

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