空间可展薄膜平面结构的动力学建模及在轨参数辨识研究

Because of lightweight and super-flexible characteristics of large-scale membrane structure planar antenna，its dynamic performance parameters are complicated. In order to capture its on-orbit structure dynamic characteristics，a dynamic model of large-scale space developable membrane structure is established by the temperature-structure pre-stress introduction method，and the dynamic characteristics of the developable membrane structure are analyzed. Through the established dynamic model，the Eigensystem Realization Algorithm（ERA）is used to study the on-orbit identification of the modal parameters of the membrane structure planar antenna. The comparison between the identification results and simulation results shows that the ERA method can effectively identify low-order natural modes of the membrane structure plane antenna，which provides a theoretical basis for its engineering implementation.