Optimization and guidance of very low-thrust transfers to geostationary orbit

被引:0
|
作者
Gil-Fernandez, Jesus [1 ]
Tarabini, Lorenzo [1 ]
Graziano, Mariella [1 ]
Gomez-Tierno, M. A. [1 ]
机构
[1] GMV SA, Madrid 28760, Spain
来源
JBIS-JOURNAL OF THE BRITISH INTERPLANETARY SOCIETY | 2008年 / 61卷 / 04期
关键词
trajectory optimization; low-thrust; optimal control; non-linear programming; guidance;
D O I
暂无
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
A new hybrid direct-indirect optimization algorithm is presented to compute the minimum-time transfer between two orbits, including the phasing with a desired spacecraft. Very-low thrust means several hundred revolutions to perform the large change in orbital elements. The optimal control solution of the fast-evolution problem combined with a direct method for the secular trajectory avoids the numerical instability arising in very long propagations, decreases the computational time, reduces the sensitivity to the initial guess and provides a feasible transfer at every optimization step. Optimization of transfers from GTO to GEO is presented and two types of trajectories are analysed, sub-synchronous (apogee constrained below GEO altitude) and super-synchronous (free apogee altitude). The optimization of a transfer from LEO to a very high orbit (11 ' 23 R E) is presented, showing the applicability of the method to different problems. A guidance algorithm is presented to compensate the deviations of the real trajectory from the optimal one due to off-nominal conditions. The results in closed-loop simulation of the guidance scheme to compensate detenninistic perturbations not considered in the optimization show good performances in both analysed missions.
引用
收藏
页码:139 / 145
页数:7
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