大型空間環(huán)形桁架天線反射器展開(kāi)動(dòng)力學(xué)模擬與實(shí)驗(yàn)研究
[Abstract]:In recent years, deployable ring truss antennas have been widely used in the aerospace field as the key technology to improve the level of communication satellites. The loop truss antenna reflector can be regarded as a complex rigid-flexible coupling multi-body system composed of deployable ring truss and flexible cable mesh reflector. In order to accurately characterize the large rotation and large deformation motion characteristics of flexible members, this paper uses the absolute coordinate (ACB) method combined with the absolute node coordinate method (ANCF) and the natural coordinate method (NCF) to model the system. In order to improve the computational efficiency of antenna deployment dynamics simulation, a parallel algorithm based on static condensation method and multilayer domain decomposition method is proposed to efficiently solve the dynamic equations of large scale rigid-flexible multibody systems. In addition, in order to accurately reflect the phenomenon of non-synchronous expansion of reflector, the influence of driving force attenuation is considered in the dynamic model of expansion. Finally, based on the above method, the dynamic analysis of the second stage of the expansion of the reflector of the annular truss antenna is carried out, and the numerical simulation results are verified by the experiments on the ground of the 4 m scale annular truss antenna.
【作者單位】: 北京理工大學(xué)宇航學(xué)院;中國(guó)空間技術(shù)研究院西安分院;
【基金】:國(guó)家自然科學(xué)基金(編號(hào):11290151)資助項(xiàng)目
【分類號(hào)】:TN820.84
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