大口径天线卫星挠性耦合计算仿真分析  

Flexible Coupling Simulation Analysis of Satellite with Large Aperture Antenna

作　　者：许海玉[1] 王皓[1] 关欣 曾擎[1] XU Hai-yu;WANG Hao;GUAN Xin;ZENG Qing(Shanghai Institute of Satellite Engineering,Shanghai 201108,China)

机构地区：[1]上海卫星工程研究所,上海201108

出　　处：《计算机仿真》2025年第3期67-73,共7页Computer Simulation

摘　　要：微波遥感卫星图像分辨率越高,要求天线口径越大,天线挠性就越大,低频模态越密集,加之天线旋转扫描成像,极易与太阳电池阵等挠性附件产耦合共振,严重影响了卫星姿态稳定精度,造成遥感图像质量下降。以某高轨微波遥感卫星为例,首先建立了挠性卫星动力学模型,根据大尺寸微波天线,太阳电池阵有限元模型,得到约束模态特性和耦合系数,最后结合整星质量特性,在运动部件不同转速下,对可能产生的耦合共振进行分析,给出了耦合共振对卫星平台稳定精度影响程度及相应的控制措施,为卫星在轨业务运行提供了有效保证。The higher the resolution of microwave remote sensing satellite image,the larger the antenna aperture,the greater the flexibility of the antenna,and the denser the low-frequency modes.In addition,the rotating scanning imaging of the antenna is very easy to produce coupling resonance with flexible accessories such as solar arrays,which seriously affects the stability and accuracy of the satellite pointing,resulting in the decline of the quality of remote sensing images.In this paper,a high orbit microwave remote sensing satellite is taken as an example.First,the dynamic model of the flexible satellite is established.According to the finite element model of large-scale microwave antenna and solar array,the constraint modal characteristics and coupling coefficients are obtained.Finally,in combination with the mass characteristics of the whole satellite,the possible coupling resonance is analyzed at different rotational speeds of rotating parts,and the influence of coupling resonance on the stability accuracy of the satellite platform and control measures are given,which provides an effective guarantee for the operation of satellite on-orbit services.

关 键 词：共振 模态特性 耦合系数 姿态稳定 挠性附件 

分 类 号：V411.8[航空宇航科学与技术—航空宇航推进理论与工程]