CAJ | 학술논문

月球软着陆轨道优化是月球探测中的关键技术之一,研究了基于燃料最优的定常推力月球探测器软着陆轨道优化问题.在优化算法中,首先对软着陆轨道动力学方程做归一化处理,经过将软着陆轨道离散化,应用函数逼近法拟合推力控制角,从而将轨道优化问题转化为参数优化问题,最后设计了蛙跳算法作为搜索优化方法.仿真结果表明设计的轨道较好地满足了所要求的约束条件,同时蛙跳算法具有很高的优化精度,并且应用比较简便,可以应用于登月软着陆的轨道优化设计任务.
월구연착륙궤도우화시월구탐측중적관건기술지일,연구료기우연료최우적정상추력월구탐측기연착륙궤도우화문제.재우화산법중,수선대연착륙궤도동역학방정주귀일화처리,경과장연착륙궤도리산화,응용함수핍근법의합추력공제각,종이장궤도우화문제전화위삼수우화문제,최후설계료와도산법작위수색우화방법.방진결과표명설계적궤도교호지만족료소요구적약속조건,동시와도산법구유흔고적우화정도,병차응용비교간편,가이응용우등월연착륙적궤도우화설계임무.
The optimization of lunar soft-landing trajectory is one of the key techniques of lunar exploration mis-sion. This paper researched the optimal trajectory problem of lunar probe with fixed-thrust based on the minimal fu-el principle. In the optimization algorithm, the trajectory dynamic function was normalized firstly. Then through dis-cretizing the trajectory and fitting the thrust control angle by function approach method, the trajectory optimization problem was converted to a parameter optimization problem. Finally, the search method based on shuffled frog lea-ping algorithm was designed. The simulation result shows that the designed trajectory meets the required restrain per-fectly, and the shuffled frog leaping algorithm has the advantages of high optimization precision and simple applica-tion, hence it can be applied to the task of designing an optimal trajectory of lunar soft landing.