Semi-analytical acquisition algorithm for repeat-groundtrack orbit maintenance  

作　　者：Chuan Liao Ming Xu Xianghua Jia Yunfeng Dong 

机构地区：[1]School of Astronautics,Beihang University,Beijing 100191,China

出　　处：《Astrodynamics》2018年第2期161-173,共13页航天动力学（英文）

基　　金：The research is supported by the National Natural Science Foundation of China(Nos.11772024 and 11432001);the Fundamental Research Funds for the Central Universities.

摘　　要：In this paper,the orbit acquisition and maintenance strategies for the repeat-groundtrack orbit are investigated to maintain the ground track of the satellite within a certain range.Two kinds of orbital dynamics models are intoduced to calculate the on-orbit state of stellite.One i the orbital propagation model which is of high fldelity and can spproximately express the forces acting on the satellite.The other is the design model which is of low fldelity and utilized by the semi-analytical scquisition algorithm to yield the reference repeat-groundtrack orbit.Combining the dilferential correction and analytical expressions,the results computed by the semi-analytical acquisition algorithm are of relatively high precision compared with the genetic algorithm.At the same time,the computational burden of the semi-analytical acquisition algorithm is far less than the genetic algorithm Based on the reference orbit,two orbit maintenance strategies which are designed for chemical and electric engines are put forward to correct the orbit in order to make the ground track of satellite shift in a certain range.Tbe applicatfon to the Chinese French Oceanie Satellite mission has well validated the fewibility of these two strategies.Simulation results have shown that the strategy designed for chemical engine can keep the ground track displacement within 200 m,while all the orbit points can possess sub-meter repeat distance through adopting the strategy desigmed for the electric engine,which satisfles the requirements of the Chinese-French Oceanic Satellite mission.

关 键 词：repeat-groundtrack orbit orbit acquisition orbit maintenance semi-analytical acquisition ALGORITHM CFOSAT 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]