地球同步卫星高斯颤振效应仿真与分析  

Simulation and Analysis for Gaussian Jitter Effects of Geosynchronous Satellite

作　　者：李毓伦 杨威[1] 郭嘉仪 Li Yulun;Yang Wei;Guo Jiayi(School of Electronics and Information Engineering,Beihang University,Beijing 100191,China;Key Laboratory of Electronics and Information Technology for Complex Aerospace System,National Space Science Center,Chinese Academy of Sciences,Beijing 101499,China)

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191 [2]中国科学院,国家空间科学中心复杂航天系统电子信息技术重点实验室,北京101499

出　　处：《系统仿真学报》2021年第2期434-444,共11页Journal of System Simulation

基　　金：National Natural Science Foundation of China(61701012)。

摘　　要：兼具高分辨率与重访率使地球同步卫星可能对地面目标区域具备广域连续监测能力。针对成像目标偏移问题,研究了考虑平台微振动在概念建模阶段的必要性。观测区域抽象为基于离散事件系统范式(Discrete Event System Specification,DEVS)的事件发生器,对姿态稳定数字系统的高斯颤振激励信号进行理论分析及仿真试验。结果表明,姿态响应仍服从正态分布,光轴与地面交点的距离偏移可至十余千米,多普勒中心频率最大估计误差为数十赫兹。研究结论可用于提升地球同步卫星监测模型设计的准确性。Ultrahigh-spatial-resolution and high-temporal-revisit appear to be realizable for future space-borne imaging missions. By taking advantage of satellites on the geosynchronous orbit, the wide-area continuous monitoring capacity to ground target zones becomes possible. Focus on the imaging target displacement, it is necessary to study the platform jitter during the conceptual modeling phase. Discrete Event System Specification(DEVS) is employed to abstract the observation area as an event generator. The attitude stabilization is digitalized and both theoretical analysis and simulation experiments of Gaussian-excited signals are provided. Simulation results show that the distributions of attitude responses preserve the normality. The offset distance of intersections between the optical axis and the ground could be more than ten kilometers, and the maximum estimation error of Doppler centroid frequencies is tens of Hertz. The conclusions help to improve the design accuracy of the geosynchronous satellite monitoring modeling.

关 键 词：姿态稳定 DEVS建模 微振动 多普勒中心频率 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]