电推进航天器的轨道转移优化设计  

Orbit Transfer Optimization Design for Spacecraft of Electric Propulsion

作　　者：韩威华[1,2,3] 杨新[1] 姜萌哲 

机构地区：[1]中国科学院光电研究院,北京100094 [2]中国科学院大学,北京100049 [3]北京航天飞行控制中心,北京100094

出　　处：《计算机仿真》2013年第11期50-53,79,共5页Computer Simulation

基　　金：中国科学院光电研究院自主部署研究生创新基金"雏鹰计划"(Y30B02A18Y)

摘　　要：在航天器的轨道转移优化设计问题的研究中,为提高设计系统的鲁棒性、时效性,建立了电推进连续小推力轨道转移优化的模型,设置了1个仿真系统场景,并应用Legendre伪谱法将仿真场景转化为非线性规划(nonlinear programming,NLP)问题,采用Matlab的SNOPT软件包进行仿真。同时,估计了协变量,对Legendre伪谱法求解的最优性进行验证,并应用间接法复核仿真场景。分析对比两种方法的仿真过程及结果可见,Legendre伪谱法对初值不敏感,鲁棒性强,收敛快,具备实时控制潜力,适合用于电推进航天器的轨道优化设计。Electric propulsion is promising as a crucial technology, and the optimal orbit transfer trajectory design for continuous-thrust is one of its developing directions. But, general methods are not suitable for fragility, time-con- suming or non-optimality. At first, the model of orbit transfer optimization using continuous-thrust was brought out. Then, the model was transformed into nonlinear programming （NLP） problem by Legendre pseudospeetral method which is presented recently as a novel algorithm, and the NLP was solved by SNOPT based on Matlab. In the mean time, through costatc estimate, the optimality of the solution was achieved and analyzed. Also, the problem was solved through general indirect shooting methods. The simulation and the obtained outcomes demonstrate that the Leg- endre pseudospectral method is robust, quickly converged, and potential for in-time control. As a consequence, the Legendre pseudospectral method is suitable for optimal trajectory design of electric propulsion thrust, and it will play an important role in the spaceflight projects soon.

关 键 词：电推进 轨迹优化 轨道转移 勒让德伪谱法 间接法 

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]