卫星在降交点地方时不变的最优轨道转移研究

发布时间：2018-01-14 09:35

本文关键词：卫星在降交点地方时不变的最优轨道转移研究　出处：《计算机仿真》2016年05期 　论文类型：期刊论文

【摘要】：卫星在运行时要求降交点地方保持不变,而在卫星变轨前后降交点地方时不变情况下要用有限推力燃料达到最优异面轨道转移问题。针对降交点地方时不变、有限推力等难点,利用虚拟目标卫星的概念,建立了轨道转移的相对运动模型,提出了保证降交点位置不变的变轨初始条件;基于极小值原理将燃料最优变轨问题转化为两点边值问题,并采用共轭梯度法进行数值求解。针对变轨时间固定、连续推力情况,以总冲最小、满足各种约束为指标,进行了异面转移轨道的优化设计验证。仿真结果验证了卫星轨道转移策略和算法达到最优转移。
[Abstract]:When the satellite is in operation, it is required that the point of descent be kept constant, but the problem of orbit transfer of the best plane should be achieved with finite thrust fuel under the condition that the local time of the point of descent before and after the transformation of the satellite orbit is invariable, aiming at the local time invariant of the point of descent. Using the concept of virtual target satellite, the relative motion model of orbit transfer is established, and the initial condition of orbit change is put forward to ensure the invariance of the position of descent point. Based on the minimum principle, the fuel optimal orbit transfer problem is transformed into a two-point boundary value problem, and the conjugate gradient method is used to solve the problem. For the case of fixed orbit transfer time and continuous thrust, the total impulse is minimized. The optimal design of the off-plane transfer orbit is verified by satisfying various constraints. The simulation results show that the satellite orbit transfer strategy and algorithm reach the optimal transfer.
【作者单位】：西北工业大学航天学院;
【分类号】：V412.41
【正文快照】： l引言实际工程中,有些轨道转移任务要求降交点地方时在变轨前后保持不变。比如,对于太阳同步轨道上的气象卫星而言,为了保证变轨前后都能在基本相同的太阳光照角条件下定时获取同一地区的观测资料,就要求变轨前后的降交点地方时保持不变。此外,变轨过程中,实际推力大小是有限

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