摘要
提出了一种用变推力火箭发动机实现月球定点软着陆轨道的优化方法。在软着陆加速度线性变化条件下,给出了位置速度状态参数以及推力加速度、推力和秒流量的计算模型,通过调整总飞行时间和着陆点位置实现了燃料消耗最小的优化。该法简单,易于工程化,适于用变推力火箭发动机在月球上实现定点软着陆的任务。算例证明了此法的可行性和有效性。
A trajectory optimization approach of lunar soft-landing with variable thrust was presented in this paper.In case of acceleration changing linearly, the formulas to compute motion parameters and thrust were derived.And fuel-optimal soft-landing trajectories of lunar probes were investigated through selection of flight time and landing position.The method was simple to implement guidance for soft-landing on the appointed position of the lunar surface.The examples showed that the method would be feasible and ...
出处
《上海航天》
北大核心
2008年第4期31-34,共4页
Aerospace Shanghai
关键词
月球探测
软着陆
轨道
变推力火箭发动机
优化
Lunar exploration
Soft-landing
Trajectory
Variable thruster
Optimization
